Build with familiar tools
Use base-ten blocks, counters, fraction pieces, number lines, and geometric models.
Proof Lab · Elementary through high school
Make mathematical thinking visible.
An open-ended workspace for building, comparing, and explaining with virtual manipulatives. Put models and drawings on the same board so the class can reason together.
See what’s inside21
tool categories
Verified in the Proof Lab tool catalog. Published content and trial access are different.
What you can do with Proof Lab
Connect representations
Explore tape diagrams, area models, tables, and graphs in one workspace.
Keep your thinking
Use multiple boards, undo changes, and export your work as an image.
A simple classroom workflow
- 1
Choose a manipulative or model from the palette.
- 2
Arrange pieces and annotate your reasoning.
- 3
Compare strategies together and export a board to revisit.
Curriculum and standards connections
Flexible tools support number sense, operations, fractions, algebra, and geometry. Choose the models that fit your lesson; this is not a prescribed curriculum or an official standards certification.
One app. One annual subscription.
$79 per teacher, per year
Renews annually. Cancel from Manage subscription. Buying this app does not include the other apps.
Optional Worksheet Lab add-on: $10 more per year. Only available with Proof Lab; it ends if Proof Lab ends.
Start with the free trialQuestions before you start?
Is this a worksheet library?
No. Proof Lab is an open-ended manipulative workspace. Worksheet Lab is an optional paid add-on.
Can I save a model?
The open workspace autosaves in this browser. You can also export your board; browser storage is not a substitute for a backup.
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