Focus on Foundations

Education

Edu is the menu of practice tools and applets — currently work-in-progress lessons and quizzes about arithmetic and logic. Open it when you want to practice, check fluency, or review a child’s progress. Sign in if you want work saved to your account; guests can still try the tools.

Interactive tools for practicing core skills, seeing progress clearly, and giving kids the next right challenge.

Math Quiz

Practice and assessment modes for arithmetic fluency. Works as a guest, and saves online with an account.

Choose a quiz

Use on this device without an account →

Math Quiz is arithmetic practice and assessment for addition, subtraction, multiplication, and other operations. Choose a quiz for a child or yourself. You can try it signed out; sign in to save online. Inside Math Flu, open Analysis for session detail or Fluency for the detailed tracker.

Counting Creatures

A number-sense applet for seeing counting systems through humans, sloths, and computers.

Explore V1 The original guided tour Explore V2 Adaptive adventure with binary practice
Counting Creatures is a number-sense applet about how humans, 3-toed sloths, and digital computers count. V1 is the original short tour; V2 is an adaptive adventure with place value, number bases, and binary practice. Choose Explore V1 or Explore V2. V2 saves each explorer’s progress in this browser, or on your account when signed in.

Logic Gates

A hands-on path from switches and gates to a working binary full adder.

Explore
Logic Gates is a hands-on applet from switches and gates to a working binary full adder. Open it and follow the steps on the page. Sign in if you want any saved applet state on your account.