Terrific Triangle

Terrific Triangles  

   Google Play

Fact Family Flash Cards


A math facts drill-and-practice program that teaches fact families for both addition/subtraction and multiplication/division.


What it does:
The triangle presents two parts of a fact family and the player must determine the missing third part. The sum and product always appear at the top of the triangle. The addends and factors always go in the two lower corners.


Terrific Triangle is free for Mac and Windows. It is also free on the App Store and in Google Play. There are no in-app purchases or advertisment banners.

Screen Shots

Desktop 1         Desktop 2         Mobile 1         Mobile 2


Mac Download

Win Download

System requirements

iPhone or iPad:  iOS 8.1 or greater

Android:  4.4 (KitKat) or greater

Mac:  OSX 10.9 (Mavericks) or greater

Windows:  7 or greater


Version 1.3.1 brings support for Android and...   64-bit versions for Mac and Windows   -   8-2019

Originally written for Mac OS in 2003 by Scott Morrow for use in his third grade classroom as a supplement to the Everyday Mathematics program (SRA / McGraw-Hill.)

Rewritten in 2018 for use on iPads in his second grade classroom, the current version now supports iOS, Android, MacOS and Windows.

Written with Livecode - Livecode https://livecode.com