Applet Library

A collection of interactive web applets for mathematics and science education, created by Todd Edwards of the Technology Educator Alliance, primarily as tools for teaching and learning. They are designed for hands-on mathematical exploration in the classroom. Each applet is self-contained with its own README and can be used independently.

Talks

Routines & ConjecturingA guest session for future middle-grades teachers (TCE 412M, September 2026): slides, handouts and eight open problems. Who Gets to See the LightAn hour for teachers on free AI in the classroom, kept in one place for anyone who was in the room or wishes they had been.

Teaching & Learning

MarginaliaA reading-and-writing studio: read and annotate five source documents, and think in the margin. TelefoneTelephone, except the machine is every player. nVokeFind out how someone actually sees a shape. Sort LabAn open-sort surface for talking about how learners categorize. Watch Your Own ThinkingThree metacognitive math puzzles that record how you solve, then hand the reasoning back to you. How Close to 100?YouCubed's array game on a 10×10 grid: roll two dice, draw the array, and fill the board with a partner or the computer. Standards CrosswordPick a framework, grade and standard, then solve a crossword that reviews it. CliqueA Connections-style word puzzle game for the classroom. PEMDAS WordleA Wordle-like game for equations. Orbit ExplorerExplore the dynamics of Collatz-style functions: watch the trajectory and any cycle it falls into.

Retro Educational Games

Maze gamesTwo Pac-Man mazes, played from both sides. In Chomp & Spell you eat letters and spell words with them; in Haunt you are the ghosts.Chomp & Spell, Haunt Shooting games Under constructionFour shooters: a maze with the lights out, a five-beam horizon drawn two ways, and a city by the sea under attack.Circuit Breaker, Vanishing Point, Vanishing Point 360, Tidewall Dodge-'em games Under constructionGet across, or get up, without getting hit: toads crossing a road on a rainy night, and a climber on a twelve-floor building.Hop Count, Twelve Stories Adventure gamesExplore and find things: draw a dungeon and walk through it, or document the animals of the Amazon rainforest by lantern.Dragonkeep, Lantern Run

Utilities

meetcapRecords a meeting as two separate tracks and transcribes them locally with Whisper. Linux desktop app. TeleprompterA single-file browser teleprompter for recording short video lessons and podcasts. NarratorRecord a podcast in pieces, add music and sounds, and download one audio file. Works on a phone, and nothing is uploaded.

Research

verbatimRecords a student's conversation with an AI exactly as it happens, and hands back one JSON file per student ready for analysis. TutorLab Under constructionBuilds an AI tutor for one assignment from a few choices, lets you try it as a student, and hands students a single file that records the session with verbatim. First Look Under constructionLogs what you see in a lesson as it happens: tap what happened, tag who was involved, and get a time-stamped timeline. The data stays on your own device. Second Look Under constructionHelps a research team read, code, and compare qualitative data together, from first read to agreed codes. Sign-in for study teams.