Observed arrival · 2026-09-26
Lemma: math practice that checks every step
Lemma offers free ALEKS placement and TEAS math practice, checking each line of a student’s work and explaining mistakes.
○Open
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$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- ALEKS placement and TEAS math test-takers
- Worth noticing
- A topic passes only after four fresh problems solved without hints; assisted work is marked separately.
Field notes
Topics begin with a problem rather than a lesson; students who solve it unaided can skip ahead. The site distinguishes help from independent work: asking for a hint marks that problem as solved with help, while four fresh unaided problems are required to pass a topic. Its listed coverage separates ALEKS foundations and algebra, precalculus, optional Calculus I, and a distinct TEAS track.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue