Place Value Lab
Hundreds, tens and ones you can grab
About Place Value Lab
Base-ten blocks you can drag, group and break apart. Build the number, regroup it, or say what the digits are worth.
Ankhdase tracks 4 distinct skills in Place Value Lab, including Place value, Counting to 20, Comparing numbers and Rounding. Because mastery is estimated per skill rather than per game, the questions shift toward whatever a student is getting wrong — and away from what they have already proved they know.
How to play
- Tap a block to add it to the mat, tap one on the mat to take it away.
- Ten blocks in a column automatically trade up for one bigger block.
- Some rounds ask you to build a number; others ask what a digit is worth.
Skills Place Value Lab practices
- Place value
- Counting to 20
- Comparing numbers
- Rounding
Mastery is estimated separately for each of these, which is what lets the difficulty move independently — a student can be fluent on one and still be fed easier questions on another.
Questions about Place Value Lab
- Is Place Value Lab free to play?
- Yes. Place Value Lab is free, runs in any modern browser, and needs no download or plugin. You can play straight away without an account; signing in is only needed if you want progress, streaks and badges saved.
- What age is Place Value Lab for?
- Place Value Lab suits ages 5–10 — roughly Kinder to Grade 4. The difficulty adapts as you play, so it stays useful across that whole range rather than being pitched at one year group.
- What does Place Value Lab teach?
- It practices Place value, Counting to 20, Comparing numbers and Rounding. Every question is tagged with the skill it exercises, so progress is tracked skill by skill rather than as one overall score.
- Does Place Value Lab work on a tablet or phone?
- Yes. Place Value Lab works with touch as well as a mouse, and every drag action has a tap-to-select alternative. Once the page has loaded once it also keeps working offline.
- Can teachers assign Place Value Lab?
- Yes. Teachers can create a class, add students in bulk without email addresses, and set Place Value Lab as an assignment with a goal — a score, a number of minutes, stars or a typing speed. Progress updates automatically as students play.