For teachers
Visualizers for a class page
Put a live calculus visualizer on your class page with one iframe. It works in Google Sites, Canvas, Schoology, Moodle and WordPress. Students drag in the page they already use. No login, nothing to install.
5 visualizers and 12 teaching calculators are free to embed. The front door is widgets, starting with the Riemann sum widget. Host-by-host steps: Google Sites, Canvas, Schoology. Assistants can read the same offer on the assistant page. Term: Riemann sums.
Try it on this page
Drag n. This is the same Riemann sum your students get, and the one you can put on a class page with the snippet underneath.
Assign practice without accounts
Pick AB or BC and the question families you have covered, and the builder produces one link. Every student who opens it gets the same questions in the same order, with feedback and worked solutions, and finishes with a completion summary they can copy and hand in. Nobody signs up for anything.
Account-free assignments
Build a frozen practice link
Choose the course, reviewed question families, and length. The link contains the frozen question order, so every student who opens it gets the same session. No class name, student name, login, or response is collected.
Where to paste it
- Google Sites. Insert, Embed, Embed code. Paste the snippet, then publish.
- Canvas. Edit the page, switch to the HTML editor, paste, save.
- Schoology, Moodle, Blackboard. Use the HTML or embed widget, not only the rich-text box, so the iframe is not stripped. Moodle, Schoology.
- WordPress and Notion. WordPress: a Custom HTML block. Notion: /embed, then the iframe URL.
Heights that fit
Visualizers ship at 620 pixels tall. Teaching calculators ship at 560. If a theme crops the widget, raise the height in the iframe tag. Width is 100 percent so the visualizer follows the column it sits in.
What else is here
- 27 method guides, each built around the question a solver cannot answer: which technique this problem wants, and why.
- Theorem pages with every hypothesis pulled apart and a worked counterexample for dropping it.
- 6 reference tables and answer-first lookups for derivatives, integrals, limits and series convergence.
- Unit-by-unit pages following the current College Board CED, with the published weighting bands.
How the mathematics is checked
Every stated derivative, integral, limit and series verdict is verified numerically on each build, and the build fails if one stops checking out. The counterexamples on the theorem pages are checked the same way, in reverse: each one is confirmed to actually break the conclusion it claims to break.
Using this with a class? Say so.
Nothing here needs an account and nothing costs anything, so there is no form to fill in and no trial to start. The one thing worth doing is telling me, because what gets built next is decided almost entirely by what teachers say is missing.
Goes straight to calclearn@gmail.com. Written and maintained by Jude Wallis, a high school student, so replies come from a person rather than a support queue. Found a mistake instead? Send the correction. Errors get fixed the same day where I can.