Grade 12: Science
Start with a unit whose prerequisites fit. Work through the lessons, use the study guide to review, and try the new cases before continuing.
- Unit 1 · 4 lessons
Exponential decay, uncertainty, and model inference
Apply half-life models, interpret probabilistic counts, and infer a rate from bounded evidence.
Before you begin: Use exponents and fractions; distinguish amount, expectation, and exact individual counts.
- Unit 2 · 4 lessons
Stars, Spectra and the Universe
Use astronomical evidence with careful scale and inference.
Before you begin: Read or listen to supplied scientific descriptions and follow a labeled diagram. · Use signed quantities, ratios, exponents and the explicitly supplied model formulas.
- Unit 3 · 4 lessons
Earth Energy and Climate Feedback
Account for energy pathways and distinguish feedback from simple correlation.
Before you begin: Read or listen to supplied scientific descriptions and follow a labeled diagram. · Use signed quantities, ratios, exponents and the explicitly supplied model formulas.
- Unit 4 · 4 lessons
Sustainability and Resource Accounting
Compare resource options using boundaries, units and lifecycle tradeoffs.
Before you begin: Read or listen to supplied scientific descriptions and follow a labeled diagram. · Use signed quantities, ratios, exponents and the explicitly supplied model formulas.
- Unit 5 · 4 lessons
Engineering Optimization and Robustness
Rank feasible models and test how assumptions affect a choice.
Before you begin: Read or listen to supplied scientific descriptions and follow a labeled diagram. · Use signed quantities, ratios, exponents and the explicitly supplied model formulas.
- Unit 6 · 4 lessons
Scientific Evidence and Capstone Design
Build a reproducible bounded scientific explanation and design proposal.
Before you begin: Read or listen to supplied scientific descriptions and follow a labeled diagram. · Use signed quantities, ratios, exponents and the explicitly supplied model formulas.
Check what you can explain
The subject test uses additional supplied cases across these units. Its feedback links back to the relevant lessons. Use it to plan practice; a score on these questions is not a school grade or proof of complete subject mastery.
Open the subject test