In this interactive environment, students learn about place value and practice regrouping by playing with birds.

May-Li Khoe and Andy Matuschak made this demo during Khan Academy's Healthy Hackathon IV.

➡️ Play it for yourself! (works best on a desktop or laptop with sound)

Next

If we continued with this prototype, we'd next have the student practice two-digit addition and subtraction by having them move two-digit numbers of birds between houses.

Then we might reveal how the operations they're performing correspond to the traditional multidigit arithmetic algorithms.

Building it yourself

To build the web app, run:

npm install && grunt

Then open index.html.