Arithmetic strategy
Number Trail
Combine number tiles with operations to reach a target. The calculation trail explains every move.
6 missions · Foundation · Untimed
Math foundations
Numbers, fractions, prime factors and proportions.
5 activities · 30 guided missions · No account needed
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Visual fractions
Fraction Studio
Paint fraction bars, match equivalent amounts and combine unlike denominators.
6 missions · Foundation · Untimed
Prime factor trees
Factor Forest
Split composite numbers into a growing tree until every leaf is prime.
6 missions · Foundation · Untimed
Proportion workshop
Ratio Kitchen
Scale illustrated recipe cards for a different batch size without changing the ratios.
6 missions · Developing · Untimed
Applied reasoning
Number Sense Check
Six applied problems with plausible alternatives and worked explanations.
6 missions · Stretch · Untimed
Practice, with a little more purpose.
Work without a countdown. Try the model, use a hint, then read the explanation. Checkpoints and practice records stay on your device. Teaching tools create shareable activity playlists and printable worksheets with answer keys.
These are original practice activities, not an accredited course or a secure assessment. Difficulty labels are editorial, not formal grade alignment. Science activities use explicitly simplified models. Playing requires JavaScript; this directory does not. See each activity's reference and model limits.