KINDERGARTEN — first wonders
Playful, hands-on ideas about pushes, pulls, hot, cold and shadows — no numbers required.
In a nutshell
By the end of this stage, a learner can tell whether a bigger push or a smaller push will make something go faster or farther, and can explain simply why shadows form and why ice melts in a warm hand.
PRIMARY — hands-on science
Simple experiments with floating, machines, sound and magnets that build real intuition.
In a nutshell
By the end of this stage, a learner can predict whether an everyday object will float or sink, explain how a lever or ramp makes a job easier, and give simple correct reasons for how sound and magnets work.
MIDDLE SCHOOL — measuring the world
Where physics starts using real numbers, units and careful reasoning.
In a nutshell
By the end of this stage, a learner can attach the correct units to a measurement, check whether a formula makes sense using dimensions, and reason carefully about precision and uncertainty.
HIGH SCHOOL — the physics core
Algebra- and calculus-based mechanics, waves, thermodynamics and electromagnetism, in full rigor.
In a nutshell
By the end of this stage, a learner can solve real numerical problems in mechanics, waves, heat, electricity and magnetism using the correct equations, units and free-body diagrams.
COLLEGE — rigor & formalism
University-level derivations: relativity, analytical mechanics, statistical physics and quantum theory.
In a nutshell
By the end of this stage, a learner can derive physical laws from first principles — from Lorentz transformations and Lagrangian mechanics to statistical entropy and the Schrödinger equation — rather than just applying formulas.
You've crossed all twenty-one chapters.
From a toy car's first push to the geometry of spacetime and the operators of quantum mechanics — you now hold the full ladder of physics, kindergarten to college. Revisit any chapter's Q&A to test yourself, and carry these tools into chemistry, engineering and beyond. The genius was always in the asking.