An interactive for every topic in the CED, built one topic at a time. Nothing to install and nothing to log into — open one and start working.
Each tool does one thing a diagram can't: let a student change a variable and watch the consequence. Pull the tonicity slider and the cell responds; shift an allele frequency and the next generation follows. The handout is the paper trail — the same prompts, the same data table, ready for a class set.
Nothing matches that search yet — try a topic number, or clear the filter.
Open the tool for the topic you're studying, then answer the handout's prompts from what you observe. If your prediction and the model disagree, that gap is the thing to go read about.
Each interactive is a single page — share the link, project it, or assign it. The handout prints two-sided as a class set and matches the tool prompt for prompt, so grading stays quick. Want a short email when a unit is corrected or a new tool goes up? Sign up here. Teachers only, and nothing else is ever sent.
These run entirely in the browser. Nothing to install, no sign-in, no student information collected — a link is the whole setup.