Zhanming

Mock · Assess · Drill weak spots Natural-language math animation generation

Digital SAT and AP Calculus. Timed mocks, then drill what you still miss.

Free for students · Teacher Zone is paid

No signup, free mock5000+ questions
Bluebook-style digital SAT exam interface with timer, answer choices, and navigation

Built to feel like test day

  • No signup · no install

    Open the browser and start a full mock.

  • Pixel-perfect Bluebook UI

    Feels like test day from question one.

  • Built-in Desmos calculator

    The same graphing calculator as the real exam.

Built to feel like test day

VideoTutor: screenshot in, animated lesson out

Paste a question screenshot — get a step-by-step animated explanation, then ask follow-ups live.

Try VideoTutor →

Upload or paste

Drop a clear crop of one SAT question — JPEG, PNG, or WebP.

Animated walkthrough

Watch each reasoning beat play out, not a wall of text.

Live follow-up

Still stuck? Ask on the spot while the lesson is open.

Desmos Coach

Learn the exam graphing calculator with skill cards — Demo, Practice, and Ask until it feels natural.

Start practicing →
Desmos Coach

Teacher GeoGebra Assistant

Teachers describe in plain language — generate GeoGebra math and physics animation figures.

Free trial · 5 designs per day for free users·Left today: 5/5

Teacher GeoGebra Assistant

Free for students · Teacher Zone

Mocks, diagnostic reports, and animated explanations are free; the self-paced bank for class is in Teacher Zone.

Free

Free for students

No signup · progress saved

$0

  • All 10 full adaptive practice tests + RW/Math module diagnostics
  • Built-in Desmos calculator & real adaptive logic
  • Instant score, AI analytics, and miss analysis after each attempt
  • Full animated explanations, and you can ask as you watch.

Teacher Zone

Question bank and GeoGebra animations for teaching

$15.12/ 6 months

  • 3,365 SAT items for lesson prep and class practice
  • Assign practice by College Board domain / skill
  • Natural-language GeoGebra animations for class
  • Track class progress and miss retry

How it works

For students

Start with a timed mock. Then read that test's report and walk through the misses.

1

Timed mock

No signup. Open a full SAT mock and work on the exam clock.

2

This test's report

Score, misses, and weak spots, split by Reading & Writing and Math.

3

Desmos Coach

Practice the exam Desmos — the same calculator the math mock uses.

4

Animated explanation

Missed mock questions get a step-by-step explanation you can ask about.

For teachers

Assemble a paper from 3,365 SAT questions, then export it for students.

1

Choose the range

Pick by subject, Domain, and Skill from 3,365 SAT questions.

2

Build the paper

Set the count and difficulty, then lock them into one fixed paper.

3

Export the paper

Make a PDF. Students write on paper.

4

Figures for the paper

When you teach the paper, describe a figure in plain language and get a GeoGebra graphic.