MathematicsGrade 12
Strengthen your foundation. Make your thinking visible.
3 open units, 17 topics to explore
Current material: Units 1, 2, 3. Units 4, 5, 6, 7, 8, 9, 10 are optional future study · Subject to change.
Precalculus
2026 to 2027 · Mr. Khan
Choose a unit below. Open a lesson for notes, pictures and examples.
Try the activities, then revisit an idea whenever you need it.
Homework lives inside its lesson. Follow the turn-in steps your teacher gives you.
Precalculus · Grade 12
Start here
Unit 1: Essential Review
Find the paper you used in class. Open a digital copy, practice its questions, or try something new.
Unit 2 · Functions
9-page class handout. Online practice covers 60 prompts: 29 answer checks and 31 worked examples to compare with your own work. Four unclear graphs remain PDF-only.
Optional practice · No points or turn-in
Extra practice uses new questions on the same ideas.
Unit 2 · Functions
2-page class handout, printed pages 31 and 32. Practice the same 12 numbered questions online, with checks for all 16 answer parts.
Optional practice · No points or turn-in
Extra practice uses new questions on the same ideas.
If a PDF does not open, ask your teacher for the class copy.
These units are outside the current course sequence. Explore them if you like. Their lessons and homework previews are unassigned and may change.
Quick practice from the current units.
Practice, not a grade
Suggestions use your best whole-test results in this browser, lowest fraction first. Best results can be old: they do not show your latest attempt or prove that you know a topic.
Results from a different question count are left out. A test without a result is not a wrong answer.
Start with a lesson or self-test. Whole-test results can give you a place to revisit later.
