Mathematics Monthly
One email per month. A worked problem, a common pitfall, a new guide link, and a tool note. Written by Dr. Iris Vaughan. No marketing, no affiliate links in the email itself.
What you get
- One worked problemA problem from the current exam cycle, worked in full with the step students most often skip.
- One common pitfallThe single most frequent error on that topic, with the correct version side by side.
- One new guide or pageA link to the latest addition to the library, with a 2-sentence editorial note.
- One tool noteA specific calculator routine, Desmos trick, or exam-day technique.
Recent issues
May 2026
Why the integration by parts mnemonic fails and what to use instead
IntegrationAP Calculus
April 2026
The confidence interval error that costs marks on every statistics exam
StatisticsAP Statistics
March 2026
Proof by contradiction: why students set it up backwards
ProofDiscrete Math
February 2026
Quadratic formula vs. factoring: when each method is actually faster
AlgebraExam strategy
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