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2 total
Most popular
Most popularMost recentHighest rated
Intermediate
MathematicsGrades 4, 5, 6

Grandpa Never Loses — How to always win the 21 matchstick game (Nim)

22 questions · 15 min

VViafocusOfficial Viafocus lesson
Intermediate
OtherGrades 4, 5, 6

Who Really Won? — How votes get counted, and why the rule can change the winner

24 questions · 14 min

VViafocusOfficial Viafocus lesson

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Interactive lessons for every classroom

Every lesson on Viafocus is interactive: students answer as they go and get immediate feedback, while teachers see live results. Lessons are created by teachers across Sweden and by the Viafocus studio — official lessons carry a blue verified mark.

Start with Mathematics · Science · Official Viafocus

Frequently asked

Are Viafocus lessons free?

Yes — every lesson in the library is free to play in the browser, with no account required. A free account lets you save lessons and see results.

Can I run a lesson live with my class?

Yes. Start a live session from any lesson — students join with a code on their own devices, and their answers land on your dashboard in real time.

Who creates the lessons?

Teachers in the community and the Viafocus studio team. Lessons built by the Viafocus studio carry a blue verified mark next to the byline.

Can I use a lesson someone else made?

Yes. Any published lesson can be played, shared with a class, or copied into your own library so you can adapt it before teaching it.