Curriculum is the heart and skeleton of schooling. It dictates "what to learn" and "how to learn," fundamentally shaping a student's learning experience and path of growth. Therefore, any profound educational reform must begin with a profound curricular revolution.
The core metaphor of traditional curriculum design is a detailed "knowledge map."
This map is pre-drawn, authoritative, and not to be altered. Knowledge is divided into clear "countries" (disciplines), and within each "country," further divided into "provinces" (chapters) and "cities" (knowledge points).
The process of learning is designed as a linear "sightseeing tour" that follows the map. Students, like a tour group led by a guide (the teacher), move from one "attraction" (knowledge point) to the next along a preset, single "tour route" (the syllabus).
Whether the trip is a success depends on whether, at the end, the student can accurately point out on the map the name and basic information of every "attraction" they have "visited."
The "knowledge map" model has the virtues of clarity, efficiency, and ease of large-scale replication and management. But as we have argued repeatedly in the first two parts, its fundamental flaw lies in its "static" and "closed" nature. It presents students with a "world of certainty" that has already been fully explored and is entirely under control, while completely obscuring the vast, real "wilderness of possibility" teeming with the unknown and the challenging. It produces excellent "map readers," not brave "wilderness explorers."
The curriculum design of an "Observer School" must completely abandon this "knowledge map" metaphor. What it must build is an entirely new form of curriculum, which we call the "Exploration Field."
An "Exploration Field" is a concept diametrically opposed to a "knowledge map."
It is not a flat map, but a three-dimensional "field" rich with real terrain. Within this field, there may be a "forest" to traverse (a complex problem), a "river" to trace upstream (a historical thread), a "mountain" waiting to be climbed (an intellectual challenge), and countless "hidden treasures" (new knowledge and insights) lying in the grass, waiting to be discovered.
It has no preset, single "tour route." Instead, it provides students with diverse "exploration tools" (thinking models, disciplinary knowledge, experimental equipment) and a compelling "exploration mission" (a core driving question), and then encourages different expedition teams (learning groups) to plan and forge their own unique "path of exploration."
Success in exploration no longer depends on how many "attraction" names they remember, but on the curiosity, collaboration, problem-solving, and creativity they demonstrate during the process, and ultimately, on the unique "expedition report" brimming with personal insight and discovery that they bring back.
From "Knowledge Map" to "Exploration Field": this is not merely an adjustment in teaching methodology; it is a fundamental subversion of the philosophy of curriculum design. It marks a shift in the center of gravity of curriculum from "transmitting known certainties" to "navigating unknown possibilities."
In this chapter, we will focus on the three core pillars of building an "Exploration Field" curriculum system, along with an outstanding real-world case study. These four parts together form a roadmap for successfully translating the vision of "Observer Education" into curricular reality.
Project-Based Learning: This is the basic operational unit of the "Exploration Field." We will explore how to cultivate students' core competencies through multi-perspective observation of real problems.
Interdisciplinary Thematic Courses: These are the transportation network connecting different "Exploration Fields." We will analyze how to help students see the inherent interconnectedness of the world by breaking down disciplinary silos.
"Possibility" Curriculum: This is the "sacred spring" that nourishes the "Exploration Field." We will explain why philosophy, art, and critical thinking must be introduced to systematically broaden students' cognitive boundaries.
Finland's "Phenomenon-Based Learning": This is a real-world prototype of the "Exploration Field" already in place. Through this case, we will verify the feasibility and immense potential of the blueprint we have constructed.
Project-Based Learning: Multi-Perspective Observation of Real Problems
If the "Exploration Field" is the curricular philosophy of the "Observer School," then Project-Based Learning is the most central and effective teaching framework for putting this philosophy into practice. One could almost say that without PBL, there is no true "Observer Education."
The basic unit of traditional teaching is the "class period." A 45-minute class period typically focuses on transmitting one or several isolated "knowledge points." The basic unit of PBL, by contrast, is a complete "project." A project typically lasts several weeks or even an entire semester, revolves around a complex, real, and challenging "driving question," and ultimately requires students to produce a public, tangible "product" or "solution."
PBL is fundamentally different from what we traditionally think of as the "mini-projects" or "poster presentations" done at the end of a semester just to complete an assignment. A well-designed, high-quality PBL is the most perfect microscopic embodiment of the "Exploration Field" philosophy. It systematically embeds the cultivation of all the core "Observer" competencies discussed in the previous four chapters into its structural process.
Let us use a classic PBL case study -- the "Campus Bee Crisis" -- to dissect its mechanism for cultivating "co-creators."
The project's "driving question":
"The number of bees in our school garden seems to have been declining sharply in recent years. Is this a real problem? If so, as members of our school, what can we do to help these important little creatures rebuild a thriving home?"
The design of this driving question itself embodies the essence of PBL:
It is real and local: It is not an abstract, textbook-style problem, but one directly connected to the students' actual environment (their campus), capable of sparking genuine concern and a sense of responsibility.
It is open and complex: It has no preset standard answer, requiring students to conduct multi-dimensional investigation and creative thinking.
It demands action and output: It requires students not only to "study" the problem but to "solve" it and produce a concrete, visible solution.
The "Exploration" Process of PBL: A Complete Multi-Perspective "Observation" Journey
Faced with this driving question, students (usually in groups) will embark on a 6-to-8-week "journey of exploration." This journey perfectly mirrors a complete "empowerment cycle" from "consumer" to "co-creator."
Phase 1: Posing Questions and Establishing "Cognitive Need"
At the project's launch, the teacher does not provide any "knowledge points" about bees. Instead, they might show a shocking documentary about the global phenomenon of colony collapse disorder, or invite a local beekeeper to share the challenges they face.
Goal: To ignite students' curiosity and emotional connection, making them genuinely and urgently want to figure out: "Are the bees around us really in trouble? Why?"
The beginning of a role shift: Students are no longer "consumers" passively waiting to be fed information; they have become "detectives" facing a real puzzle. The intrinsic motivation for learning is instantly activated.
Phase 2: Investigation and Research -- Multi-Perspective "Information Construction"
Guided by the teacher, student groups begin to formulate their own investigation plan and collect and analyze information from multiple "observation perspectives."
Biological perspective: They need to go to the library and online to research the life cycle of bees, pollination behavior, and the key ecological factors affecting their survival (habitat, food sources, diseases, pesticides, etc.).
Mathematical/Data Science perspective: They need to design a scientific method for observation and counting, regularly visit the school garden to conduct sample counts of bee populations, and chart the data to determine whether the "sharp decline" is a real, statistically significant trend.
Sociological/Journalistic perspective: They need to go beyond the campus to interview local horticulture experts, farmers, and environmental organization members to learn about their views and experiences regarding the issue.
Historical/Geographical perspective: They might research how the land use history of the local community has changed (for example, from farmland to urban development) and how this has affected the local bee population.
Throughout this process, students are no longer "consuming" pre-packaged "canned knowledge." Instead, like true "researchers," they are actively searching, filtering, evaluating, and integrating information in a pristine information jungle, gradually "constructing" their own multi-dimensional understanding of this complex problem.
Phase 3: Forming a Solution -- "Creative Convergence" from "Possibility" to "Feasibility"
Once the research reaches a certain depth, students' understanding of the problem has become quite complex and systematic. At this point, the teacher raises the challenge: "Alright, we now know the problem is serious and the causes are complex. So what, specifically, can we do?"
The groups enter a "brainstorming" phase, coming up with as many possible solutions as they can, no matter how "far-fetched" they sound. For example:
Create a "bee-friendly garden" on campus specifically planted with nectar-rich flowers.
Design and build artificial "bee hotels" to provide nesting sites for solitary bees.
Launch a school-wide awareness campaign advocating against using pesticides harmful to bees in home gardens.
Write an illustrated guide titled "Campus Bee Observation Handbook" to distribute to younger students.
Then, they need to "converge" from these many "possibilities." They must evaluate each option's feasibility, cost, and impact, and ultimately select one or two as the core project their group will personally implement. This process trains their decision-making, project management, and teamwork skills.
Phase 4: Prototyping and Public Presentation -- The Social Validation of "Co-Creation"
This is the climax of PBL. Students must "materialize" their solution into a tangible, visible "product" or "action."
They might actually need to learn horticulture and create a garden on campus with their own hands.
They might need to learn woodworking and design, building a physical model of a "bee hotel" in the makerspace.
They might need to learn graphic design and public speaking to create their promotional posters and educational brochures, and deliver a persuasive public presentation of their project outcomes to the entire school.
This "public presentation" phase is crucial. It transforms student learning from a closed "internal act" done only to satisfy the teacher and exams, into a "social act" accountable to the actual "external world." Knowing that their work will be seen and evaluated by a real audience unleashes an astonishing intrinsic drive for excellence.
Phase 5: Reflection and Iteration -- The Awakening of "Metacognition"
After the project concludes, the teacher guides students in a deep debriefing and reflection.
On the project itself: "Was our solution really effective? How can we measure its impact? How could we do this project better next year?"
On teamwork: "What were the strengths of our team during this collaboration? What difficulties did we encounter? How did we resolve (or fail to resolve) these conflicts? What have we learned about 'cooperation' itself?"
On personal growth: "What was my biggest takeaway from this project? What strengths or interests did I discover in myself that I did not know before? What abilities do I still need to improve? Has this experience changed the way I see bees, the environment, or even 'learning' itself?"
This reflection process systematically helps students distill, from a concrete "doing" experience, the metacognitive wisdom about "how to learn, how to collaborate, and how to create" that can be transferred to any other context.
PBL: A Comprehensive Training Camp for "Observers"
Through the small case study of the "Campus Bee Crisis," we can clearly see that a well-designed PBL is far more than just letting students "do an activity" or "have some fun."
It is a high-density, high-intensity, integrated "learning event." It takes all the core "Observer" competencies we have discussed -- curiosity, critical thinking, creativity, collaboration, metacognition -- and no longer trains them as isolated "skill points," but organically and seamlessly integrates them into a meaningful, real, end-to-end "co-creation" process.
In PBL, the student's role is no longer singular -- that of a "listener" or "test-taker." Throughout a project, they must dynamically and flexibly switch between and play multiple "co-creator" roles:
They are a scientist, needing to conduct rigorous observation and data analysis.
They are an engineer, needing to design and create feasible solutions.
They are an artist, needing to present their results in an aesthetically compelling way.
They are a social activist, needing to persuade and mobilize others to join in a meaningful endeavor.
This is the highest-fidelity simulation of the integrative capabilities a real-world "co-creator" must possess.
A student who has been immersed in a PBL learning environment for a long time will leave school carrying not hundreds of isolated "canned knowledge points" that may soon become obsolete.
They will carry with them a robust, internalized, and actionable methodology and spirit of a "co-creator" -- a set of powerful, transferable "core equipment." This is the most precious asset an "Observer School" can give them, the "hard gear" ready for any future challenge.
Interdisciplinary Thematic Courses: Breaking Down Disciplinary Silos to See the World's Connections
If Project-Based Learning is the tactical "shock troops" for building the "Exploration Field," then interdisciplinary thematic courses are the strategic "army group." PBL typically focuses on solving a relatively specific "small problem," while interdisciplinary thematic courses aim to conduct a broader and deeper, semester- or even year-long "campaign"-level exploration around a grand, fundamental, universally significant "big theme."
Their core mission is to systematically confront and heal, from the top-level design of the curriculum, the chronic ailment of "fragmented cognition" caused by subject-based teaching, which we diagnosed earlier. What they must do is blast wide openings in the artificially erected disciplinary walls, allowing the river of knowledge to flow freely again along its natural course.
What are "Interdisciplinary Thematic Courses"?
They no longer take "discipline" as the first principle of curriculum organization. Instead, they select a sufficiently grand and rich "core theme" or "fundamental question" as the organizing center. Then, teachers from different disciplines are invited to form a "joint command headquarters" (teaching team), jointly designing and collaboratively implementing an integrated set of learning experiences. All disciplinary knowledge is no longer taught as isolated ends in themselves, but rather used as "searchlights" from different "perspectives" to illuminate and interpret the core theme.
Let us take a year-long interdisciplinary thematic course for middle school students -- "Who Are We? An Exploration of 'Humanity'" -- as an example to get a concrete feel for how it operates.
The course's "core theme": "Humanity"
The course's "fundamental questions":
Who am I? (Individual identity, consciousness and the body)
Who are we? (Group culture, society, and history)
Where are we going? (Humanity's future, technology, and ethics)
The entire school year will revolve around these three progressively deepening sub-questions. Teaching in each discipline will serve the exploration of this grand theme.
First Semester: "Who Am I?" -- Exploring the Individual
Biology class: No longer teaching cells, DNA, and the nervous system in isolation. Instead, it focuses on the sub-question: "From a fertilized egg to a complex human individual, how does life happen? To what extent does our genes determine 'who' we are?" Students learn the basics of genetics and neuroscience, but all knowledge points toward understanding the most fundamental existence of the "self."
Literature/Philosophy class: No longer analyzing literary works chronologically. Instead, it revolves around: "What are 'consciousness' and 'self'? How do we explore the universal inner experiences of humanity -- love, fear, death, and meaning -- through stories, poetry, and philosophical thinking?" Students might simultaneously read Shakespeare's Hamlet, Descartes's Cogito Ergo Sum, and a science fiction novel about AI consciousness, exploring their different definitions of the "self."
Art/Physical Education class: No longer purely skill training. Instead, it focuses on: "The body, as our 'primary medium' for perceiving the world and expressing the self, what wisdom does it possess? How can we understand and experience our own bodies more deeply through painting, dance, and sport?" Students might practice body-scan mindfulness exercises or try to express a complex emotion through body language.
Second Semester: "Who Are We?" -- Exploring the Collective
History/Sociology class: No longer linear national histories. Instead, the core question is: "How did humanity develop from isolated tribes into today's complex global society? What fundamentally different 'collective stories' (myths, religions, national narratives) have different cultures told around the question 'Who are we'?" Students might work in groups to research a non-Western ancient civilization that interests them (such as the Maya or Ancient Egypt) and analyze the similarities and differences between its worldview and our own.
Geography/Economics class: No longer memorizing place names and economic data. Instead, it explores: "How do geographical environments and economic models profoundly shape a group's cultural identity and behavioral patterns? To what extent are the boundaries of 'us' and 'them' drawn by the distribution of resources and interests?" They might simulate a "United Nations General Assembly" on global resource distribution, playing the role of delegates from different countries in negotiation and strategic interplay.
Third Semester: "Where Are We Going?" -- Exploring the Future
Physics/Computer Science class: No longer teaching only classical theories. Instead, it focuses on cutting-edge technologies -- AI, gene editing, space exploration -- and revolves around discussion of: "How will these disruptive technologies redefine the future of the 'human' species? What hopes do they bring us, and what profound ethical dilemmas do they harbor?" Students might hold a formal debate on "whether gene editing of human embryos should be allowed."
All-Discipline Final Comprehensive Project: The year's final outcome is not a subject-based final exam. Instead, it is a forward-looking, creative "co-creation" project requiring students to synthesize everything they have learned during the year.
Some groups might create a science fiction short film about "Human Life in 2050."
Some groups might design a business plan for a small non-profit organization aimed at solving a specific social problem.
Some groups might curate a school-wide art exhibition on the theme of "Technology and Ethics."
The Core Value of Interdisciplinary Thematic Courses: Constructing a "Web of Meaning"
Through such a year-long, immersive "grand exploration," what students gain goes far beyond integrated "interdisciplinary knowledge." The deeper value lies in the fundamental reshaping of their cognitive structure.
From "Knowledge Points" to a "Web of Meaning": Students' cognition is no longer a collection of isolated "silos," but is organically and networkedly connected under a grand, meaningful core theme. Every "knowledge point" gains life and meaning through its connection to that fundamental "big question." DNA in biology is no longer just an abstract molecular structure; it directly relates to "Who am I?" Wars in history are no longer just a string of dates to memorize; they are the brutal process of shaping the collective identity of "Who we are." This networked "web of meaning" is not only easier to remember, but more importantly, easier to "retrieve" and "transfer" for solving new, complex problems.
Cultivating "Systems Thinking" and "Global Vision": When students grow accustomed to repeatedly "flying over" and "examining" the same complex theme from multiple disciplinary "altitudes," they will naturally internalize a "system-thinking" mode of "observation." They will begin to see that the world is not composed of isolated "parts," but of dynamic systems that are interconnected and influence one another. This global vision -- the ability to "see connections" and "see the whole" -- is the rarest and most essential competency for future leaders and complex problem-solvers.
Inspiring "Big Question Awareness" and "Life Mission": Traditional subject-based teaching directs students' attention to countless trivial "small questions." Interdisciplinary thematic courses, by contrast, constantly bring students before those fundamental "big questions" concerning the fate of humanity. Long-term immersion in thinking about, debating, and exploring these "big questions" greatly elevates students' cognitive horizons and spiritual vision. They begin to reflect on their own connection, as unique individuals, to these grand "human stories." They begin to ask themselves, in the open-ended script of "Where are we going?," what role they truly want to play. This plants the deepest and most solid seeds for the future formation of their "life mission."
Challenges and Strategies for Implementing Interdisciplinary Thematic Courses
Undoubtedly, shifting from traditional subject-based teaching to interdisciplinary thematic courses is a massive, systemic challenge. It demands:
Transformation of the teacher's role: Teachers are no longer "subject specialists"; they must first become "cross-disciplinary learners" and "co-designers of the curriculum." This requires breaking down the silos between teachers -- the entrenched "teaching-research group culture."
Reform of school structure: Traditional discipline-based teaching-research offices and fixed 45-minute class periods must be replaced by more flexible structures that support long-term collaborative lesson planning and allow for extended project time, such as "modular scheduling."
Revolution in assessment methods: Simple, subject-based paper-and-pencil tests are completely inadequate for evaluating the higher-order, integrated abilities students gain from this type of curriculum. A shift must be made to more authentic assessments centered on "portfolios" and "performance tasks," which we will discuss in detail in Chapter 7.
This is no easy path. But it is the right path, representing the direction of curriculum evolution, and one worth pursuing with all our wisdom and courage. Because the challenges we face in the 21st century -- whether climate change, AI ethics, or global pandemics -- none are "single-discipline" problems. If we continue to use a 19th-century, fragmented curriculum to educate 21st-century citizens, it may well be the most disastrous "anachronism" our education system could commit.
"Possibility" Curriculum: Introducing Philosophy, Art, and Critical Thinking to Broaden Cognitive Boundaries
If through PBL we provide students with concrete "exploration tactics," and through interdisciplinary thematic courses we construct grand "exploration campaigns" for them, then we must also provide them with something most fundamental -- an inexhaustible "spiritual energy" and a "compass of the mind" that can sustain their lifelong exploration.
This is the mission of the "Possibility Curriculum."
The "Possibility Curriculum" is not a specific course called "Possibility." It is a category encompassing a set of course types. The core goal of this type of curriculum does not target any specific, practical "knowledge" or "skill." They do not promise to teach you how to "solve a problem"; on the contrary, they often bring you more, and more intractable, unanswered questions.
Their only, and most sublime, purpose is to systematically and consciously "pull" the student's mind temporarily out of the world of "certainty," the known, and the everyday, and directly "immerse" it in the vast, boundless "ground of possibility" filled with uncertainty, ambiguity, polysemy, and ultimate questioning.
These types of courses are what traditional utilitarian education would dismiss as "useless learning." But in the curriculum system of the "Observer School," they are precisely the "most useful." Because they directly act upon an "Observer's" most central "mental operating system," systematically performing the highest-order "expansion" and "acceleration" on their "horizon."
The "Possibility Curriculum" mainly comprises three pillars: philosophy, art, and critical thinking in a broad sense.
The First Pillar: Philosophy -- The Gym for "Big Questions"
Philosophy is the "mother discipline" of all disciplines. It does not study any specific "thing"; it studies the most fundamental "conceptual frameworks" and "structures of thinking" we use to think about and speak of all things. Philosophy is the ultimate manifestation of "metacognition."
Introducing philosophy into basic education is by no means about making children memorize the abstruse theories of Kant or Hegel. It is about bringing philosophy into the classroom as a lively, dialogical "activity of thinking." Its core is guiding students to confront those open-ended "big questions" that have troubled humanity since ancient times.
Metaphysical/Ontological questions: What is "reality"? What is "time"? Who am "I"? Do I have "free will"?
Epistemological questions: What is "knowledge"? How do we know that what we know is "true"? What is "truth"?
Ethical questions: What is "good"? How should I live? How should we build a "just" society?
Aesthetic questions: What is "beauty"? What is the value of art?
A good philosophical discussion class for children or adolescents is of immeasurable value:
It directly trains abstract thinking: Philosophical discussion forces students to grapple with highly abstract, non-material concepts. This is the most fundamental "mental warm-up" for any future study of advanced mathematics, science, or humanistic theory.
It systematically cultivates logical reasoning and clear expression: In philosophical dialogue, you cannot rely on "feeling" or "authority" to get by. You must provide clear definitions, rigorous arguments, and powerful examples for every point you make. At the same time, you must learn to listen to and understand others' complex viewpoints with precision and respond logically. This is an intellectual exercise of the highest order, far surpassing ordinary debate.
It provides a rational "anchor" for value formation: Adolescence is a critical period for the formation of students' values. Traditional didactic "moral education" is often ineffective. Philosophical-ethical discussions (through classic thought experiments like the "trolley problem") provide students with a safe, rational "space for thinking." Within this space, they can work through various complex moral dilemmas, and independently construct, clarify, and defend their own values. This forms a more stable, enduring, and tested internal "moral compass" than any external indoctrination.
The Second Pillar: Art -- The Liberated Zone of the "Non-Rational"
If philosophy is the whetstone that sharpens the "scalpel" of "logic" and "reason" in our minds, then art is the "carnival" that liberates the equally important, yet severely suppressed in traditional education, "non-rational" forces of "intuition," "emotion," and "imagination."
A person who knows only logic and reason, but has lost the capacity to feel "beauty" and "emotion," is mentally crippled. They might become an efficient "technocrat," but they can never become a visionary "creator" or an empathetic "leader."
In the "Observer School," art education is by no means a dispensable "minor subject"; it is a core curriculum of equal importance to science and the humanities. Its core value lies in systematically providing students with alternative "modes of observation."
Art teaches us to "see" form and structure: Whether learning composition in painting, harmony in music, or meter in poetry, art trains us in a form-analytical ability that transcends content -- the ability to "see the craft behind it." A well-trained artistic eye, when watching a film, sees not only the "story" but also how the director's camera language, editing rhythm, and mise-en-scène together "construct" the emotional atmosphere we experience. This insight into "how form shapes content" is a powerful "deconstructive" ability that can be widely transferred to any field.
Art teaches us to "empathize" with the experience of others: A great novel, a moving piece of music, a stirring painting -- their most magical power lies in their ability to let us temporarily "step into another's shoes" and experience a life feeling we never had -- perhaps Anna Karenina's struggle between love and social norms, or Beethoven's heroic, inner roar after going deaf. Art is the most powerful "simulator" for expanding our "emotional horizon" and cultivating "empathy." In an increasingly divided and polarized world, this ability to "feel what others feel" cannot be overemphasized.
Art is the ultimate sanctuary of "uselessness": Artistic creation is among the purest human activities, the most "autotelic" of "infinite games." It serves no external, utilitarian goal. Its entire reward is contained within the process of creation and experience itself. In a world excessively colonized by "efficiency" and "utility," art provides a sacred "sanctuary" where our minds can breathe freely, play to their heart's content, and return to the authentic state of life itself. This "uselessness" is precisely the "great use" that nourishes our spiritual health and inner richness.
The Third Pillar: Critical Thinking -- The Arsenal of the "Mental Toolkit"
Beyond the two classical pillars of philosophy and art, the "Possibility Curriculum" should also include a range of more modern "metacognitive courses" or "critical thinking workshops" aimed at directly improving students' "thinking ability" itself.
This type of course is like a "mental arsenal." It no longer teaches any specific field of "knowledge," but directly delivers and trains students in high-level "thinking models" and "thinking tools" that can be applied to any field.
How to use analogy effectively?
How to think in terms of system dynamics? (Seeing feedback loops and delay effects)
How to apply "second-order thinking"? (Considering not only the direct consequences of a decision, but the "consequences of the consequences")
How to think probabilistically? (Using Bayesian reasoning to update one's beliefs)
How to identify and counter one's own cognitive biases?
These courses are installing in the student's mind a "latticework" of what Charlie Munger calls "multiple mental models." Armed with this "latticework," when a student faces any complex problem, they no longer only have a single "hammer" (the singular thinking of their most familiar discipline). Instead, they possess a rich "toolkit," allowing them to flexibly and combinatorially select the most appropriate tools for a multi-perspective, three-dimensional "attack" based on the nature of the problem.
The "Possibility Curriculum" is the soul of "Observer Education."
It may not directly improve a student's score on any standardized test. But the invisible work of "foundation-laying" and "expansion" it performs in the depths of a student's mind will, over the long course of their future life, yield the highest returns through a compounding effect.
What it gives students is not any specific "fish" that may become obsolete, nor even a specific "fishing technique." It gives them the highest-order "wisdom of the fisherman" -- the ability to understand the tidal patterns of the entire ocean and, depending on the different waters and fish, to invent and create entirely new "fishing gear" for themselves.