**Master the mathematics behind a confident solution.**

*ALEC Digital SAT Math: 50 Skills to Master* provides focused instruction and structured practice for students preparing for the digital SAT Math section. Written by **Prof. Konstantine Onapolous, PhD**, this workbook develops understanding across Algebra, Advanced Math, Problem-Solving and Data Analysis, and Geometry and Trigonometry.

Each lesson explains an essential concept, demonstrates its application, identifies common errors, and helps students choose an effective solution method. Independent exercises give students space to work before consulting the separate explanations.

Inside you will find:

* **50 focused lessons** covering essential mathematical skills.
* **100 worked examples** with clear reasoning.
* **464 practice and assessment questions**, including lesson exercises, visual workshops, and challenges.
* **A diagnostic assessment and two timed practice assessments** to identify gaps and develop pacing.
* **Complete answer explanations** linked to the relevant lessons.
* **Desmos guidance**, formula references, mathematical vocabulary, error logs, and mastery trackers.

Designed for independent study, classroom instruction, and tutoring, this standard color edition combines readable explanations, purposeful practice, and generous workspace in an accessible 8.5 × 11-inch format.

**Understand the concept. Choose your method. Explain your answer.**

*An independent ALEC Worldwide publication. Not affiliated with or endorsed by College Board. The printed assessments are fixed-form practice and do not reproduce the SAT’s adaptive scoring.*