Addition and subtraction to 20 [Wijsr]

Are you a teacher, parent, speech therapist, remedial teacher, educator, ...?
Do you recognize the feeling ...

⚫ that you would like to help everyone in the classroom, but that this sometimes fails?
⚫ that you want to help a child as well as possible, but that you do not know where he / she gets stuck and how you can best guide him / her?
⚫ that you would like to help your child, but you don't know how?

Then this app is the solution for you! This app helps you if you want to support a child in its growth in adding and subtracting up to 20. This app is useful if the child is in the first grade/KS1 (but also in the second grade this remains an important base).

This app is very well thought out in terms of content and design.
Below you can find the most important features.


⚫ built up step by step: you can only "unlock" the next level if you master the previous type of exercises
      o Addition and subtraction up to 6
      o Addition and subtraction up to 10
      o Addition and subtraction up to 20 (without and with bridge)
⚫ 12 levels with 40 different types of exercises
⚫ the focus is on individual growth: each child can work at his level and this progress is always saved on the device
⚫ positive feedback is at the heart of the app
⚫ Uses a smart exercise generating mechanism so that every child has sufficient success experiences
⚫ intentionally picked a soothing and child-friendly layout, in which growing and blossoming are central

This app is currently available in Dutch and English. It has already been tested by a group of first grade children. They were very enthusiastic and very motivated to work this way.

This app was created in close collaboration with app developers and (care) teachers. This collaboration has made it a wonderful app with a very thoughtful content structure, based on practical experience.

If you have any nice suggestions or feedback about this app, please do not hesitate to contact us at
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42 total

What's New

1.0 Initial version
1.1 Add support for multiple pupils
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Additional Information

October 7, 2020
Varies with device
Current Version
Requires Android
4.1 and up
Content Rating
Offered By
Tradfri Lux
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