Less setup.
More understanding.
A clear visualization can start a great conversation. Every finished lesson includes a demonstration, a classroom guide, and a question worth asking.
Find a classroom demonstration ↗Choose an idea
Pick a topic your students are working on. Every experiment works without a student account.
Make a prediction
Use the exploration question before touching the controls. Give students a moment to think.
Change something
Open Present mode, adjust one parameter, and ask the class to explain the result.
Three conversations to start.
What is a derivative, really?
Bring two points together and watch a secant become a tangent.
IntermediateExplore →Why a² + b² = c²
Rearrange four triangles to reveal a timeless proof.
FoundationExplore →The directions that stay
Find vectors that remain on their own line.
AdvancedExplore →A guide,
not a script to memorize.
Open the Teaching notes tab for prerequisites, an objective, demonstration steps, a discussion question, an expected answer, and a common misconception.
Use Present for a larger view, hide values before a prediction, and share the exact configuration. Print a guide from the Teaching notes tab.
“What happens as these two points get closer?”
- Ask students to predict the secant slope.
- Move the second point toward the first.
- Compare the secant and tangent values.
- Try |x| at zero. Ask what breaks.
180 finished lessons currently include teaching notes. Every guide includes a demonstration sequence, questions, expected answers, and common misconceptions.