Lessons for Every Tested Skill, a Diagnostic, 2 Full-Length Practice Tests and 600+ Original Questions with Every Answer Choice Explained. By Matthew D. Giron, MBA. First edition (2026), for 2027 test takers. A 580-page study guide that teaches the digital SAT the way it is scored: one tested skill at a time, each with a method, worked examples, common traps, harder-module variations and practice.
What is in the book
33 chapters: how the test works, a study plan, pacing, one chapter for each Reading and Writing skill, the Math skills grouped into 14 chapters, and two full test reviews
615 original questions: 370 chapter questions, a 49-question diagnostic and 2 full-length practice tests of 98 questions each
81 typed-answer Math questions checked with the official entry rules
Every answer choice explained, with steps and a calculator option for Math
94 original figures, graphs and tables
A mistake log built on five miss types: content gap, trap, misread, careless and time
How the book and website connect
The book is complete on its own; you never need the website to use it. The website adds the same 615 questions in an interactive workspace: timed modules with a break, a typed-answer box that follows the official entry rules, a mistake log, an AI coach and video lessons for every skill.
Availability
The paperback and Kindle editions are being prepared for Amazon. This page will link to them when they are live.
Edition details
Title: Skill by Skill: Digital SAT Study Guide 2027
Author: Matthew D. Giron, MBA
Edition: First edition (2026), for 2027 test takers
Length: 580 pages, 8.5 × 11 inches
Questions: 615 original questions with every answer choice explained
Formats: Paperback and Kindle (coming to Amazon)
Specifications reviewed: 29 October 2026
Writing process: Drafted with AI assistance, then edited and checked against official sources; disclosed in the book
Chapters
Chapter 1: The Digital SAT at a Glance
Chapter 2: Your Study Plan
Chapter 3: Pacing, Guessing and Test-Day Strategy
Chapter 4: How the Reading and Writing Section Works
Chapter 5: Words in Context
Chapter 6: Text Structure and Purpose
Chapter 7: Cross-Text Connections
Chapter 8: Central Ideas and Details
Chapter 9: Command of Evidence: Textual and Quantitative
Chapter 10: Inferences
Chapter 11: Boundaries
Chapter 12: Form, Structure, and Sense
Chapter 13: Transitions
Chapter 14: Rhetorical Synthesis
Chapter 15: The Math Toolkit: Calculator, Reference Sheet and Student-Produced Responses
Chapter 16: Linear Equations in One Variable
Chapter 17: Linear Equations in Two Variables and Linear Functions
Chapter 18: Systems of Two Linear Equations
Chapter 19: Linear Inequalities
Chapter 20: Equivalent Expressions
Chapter 21: Nonlinear Equations and Systems
Chapter 22: Nonlinear Functions
Chapter 23: Ratios, Rates, Proportions, Units and Percentages
Chapter 24: One-Variable and Two-Variable Data
Chapter 25: Probability, Sampling, Inference and Evaluating Claims
Chapter 26: Area, Volume, Lines, Angles and Triangles
Chapter 27: Right Triangles and Trigonometry
Chapter 28: Circles
Chapter 29: Practice Test 1
Chapter 30: Practice Test 1: Answers, Scoring and Review
Chapter 31: Practice Test 2
Chapter 32: Practice Test 2: Answers, Scoring and Review
Chapter 33: The Final Two Weeks and Beyond
How the book was made
The text was drafted with AI assistance, then edited, solved and checked against the College Board’s published specifications as reviewed on 29 October 2026. Every question, explanation and passage is original, except public-domain literary excerpts; none is an official or retired test question.
Independence
Skill by Skill Prep is an independent study website and book. SAT® is a trademark registered by the College Board, which is not affiliated with, and does not endorse, this website or book. Bluebook™ is a trademark of the College Board. Desmos is a trademark of Desmos Studio PBC. Practice results and ranges are study estimates, not official scores or admission predictions.