Use a free virtual marble jar for estimation, counting and classroom rewards.
About virtual marble jar
Fill the jar, guess how many, then check the total.
Our picks
Marble JarDrag marbles in or press Fill; show or hide the total.
Coin JarA coin jar for money maths.
MarblesPlay marbles and count on a ten-frame.
Tips for learning
- Count a small section and multiply.
- Compare jars.
- Reveal the total after guessing.
What kids learn
- Estimation
- Counting
For parents and teachers
A favourite for reward systems and estimation.
Tips & Tricks
Beginner
Count a small section and multiply.
Pro
Reveal the total after guessing.
Educational Importance
Estimation is an important everyday maths skill.
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