This is a Japanese high school textbook of Mathematics I, which covers all materials for the first semester of Japanese freshman/sophomore year. Chapters include 1. Numbers and Expressions; 2. Functions & Equations/Inequality; 3. Trigonomic Ratios; 4. Measures of 2D and 3D Figures. These textbooks include footnotes, bold font and boxed important concepts, practice questions, and detailed explanation of answers. This is especially incorporated technical information intended for college examinations in Japan. Old textbooks and new concepts are integrated, and some mathematical concepts that exceed senior high curriculum are introduced. This includes detailed marginal notes about formulas and definitions for quick reference; high-level mathematical concepts are "starred" for future study or reference, and many more. All are processed in TEX and contains richly formatted mathematic figures and symbols. These textbooks are free to edit, share, and distribute, as long as "ftext.org" is printed on the copy somewhere.

- Mathematics > General
- Mathematics > Algebra
- Mathematics > Applied Mathematics
- Mathematics > Data Analysis & Probability
- Mathematics > Equations
- Mathematics > Geometry
- Mathematics > Graphing
- Mathematics > Measurement
- Mathematics > Number Sense & Operations
- Mathematics > Patterns
- Mathematics > Problem Solving
- Mathematics > Statistics
- Mathematics > Trigonometry

- Grade 9
- Grade 10
- Professional Education & Development
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