Free online learning tools

Build and run small emoji-based simulations by setting simple rules.

Reads the Quran with translations in many languages.

Finds songs sharing a chord progression and shows which chord most often comes next.

Set the sectors of a spinner and run trials to compare experimental and theoretical odds.

Draw rectangles on a grid and see how area and perimeter relate.

Creates bar graphs from categories and values you enter.

Builds a box plot from data and shows the median and quartiles.

Plot functions and compare their graphs as you edit the equation.

Builds a histogram from data you enter and lets you change the bin width.

Change a shape on a grid and watch its perimeter and area update.

Plots points and fits a regression line so you can see how residuals change.

Tile the plane with regular polygons and see which combinations tessellate.

Apply reflections, rotations, translations and dilations to a shape on a grid.

Explorable guide to attractors and chaos with live phase-space plots you can poke.

Listen to two notes and identify the interval between them.

Practise naming the interval between two notes on the staff.

Step-by-step interactive guide to breadth-first search, Dijkstra and A* on a grid.

Latin word lookup with grammar and declension tables.

On-screen polytonic keyboard for typing ancient Greek.

Shows American Sign Language fingerspelled letters with pictures.

Interactive lesson where you drag a 2D grid to see what a matrix does to space.

Interactive explanations of anxiety coping tips with small playable demos.

Creates AMA references for medical and scientific writing.

Creates APA references from a URL, ISBN or DOI.