Place Value Lab
Tens and ones, unlocked
- Ages
- Ages 6–9
- Verification
- Verified Oct 3, 2026
Learning fit
Labels show who asserted each claim.
Drag tens-rods and ones-cubes to build two-digit numbers, write them in expanded form (34 = 30 + 4), and compare numbers to see which is greater.
Subjects
- Mathematics (Developer disclosed)
Skills
- place value (Developer disclosed)
- base-10 blocks (Developer disclosed)
- expanded form (Developer disclosed)
- comparing two-digit numbers (Developer disclosed)
Standards
Not verified
Practical details
No adult setup
No accounts of any kind. Progress is session-only and resets when the page is reloaded.
Pricing notes: Free to use. No ads, no in-app purchases, no paid tiers.
Developer: Cogitare Labs
Browser or device
- Modern web browser (Chrome, Safari, Firefox, or Edge) on desktop, tablet, or phone. No installation or download required.
Accountability
Material changes
- Child-account requirement changed. Privacy sharing disclosure changed.
- Verification was updated.
Open the appVerified Oct 3, 2026