Skip to content

noob→toproTake the free diagnostic

Mathematics · 70–139 · 23 concepts

Middle School Mathematics

Reasoning-first Middle School mathematics: 23 concepts, each with a clear explanation, a fully worked example, and self-check questions.

Practice at this level — free

Ratios & proportional relationships

Ratios & unit rates Proportional relationships Percentages

The number system

Operations with rational numbers Negative numbers & the number line Absolute value Irrational numbers (intro)

Expressions & equations

Exponents Scientific notation Algebraic expressions One-variable equations & inequalities Linear equations in two variables Systems of linear equations

Functions

Functions (intro)Slope & rate of change

Geometry

Angle relationships Area, surface area & volume Scale drawings & similarity The Pythagorean theorem Transformations & congruence

Statistics & probability

Statistical distributions Measures of center & variability Probability (intro)