Develop number sense with counting, addition, and subtraction.

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8,000 schools use Gynzy

92,000 teachers use Gynzy

1,600,000 students use Gynzy


The Rekenrek, Abacus, or Counting Frame is a tool used to teach kindergarten math.

Use it to aid and display a wide range of number-related problems such as counting, addition, and subtraction. It helps students to understand number structures.

A digital rekekrek shown on a smartboard
Example of a virtual abacus on an interactive whiteboard

Using a Digital Abacus

You can use it with the traditional red and white beads for a 5-based structure, with a 10-based structure or even with various other colors.

Move the beads from left to right or vice versa to demonstrate basic operations!

The online teaching platform for interactive whiteboards and displays in schools

  • Save time building lessons

  • Manage the classroom more efficiently

  • Increase student engagement

About Gynzy

Gynzy is an online teaching platform for interactive whiteboards and displays in schools.

With a focus on elementary education, Gynzy’s Whiteboard, digital tools, and activities make it easy for teachers to save time building lessons, increase student engagement, and make classroom management more efficient.

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