The Circle
Meet the center, radius and diameter of a circle; discover π by rolling a circle, then derive the circumference and area formulas.
Ratios & Percents
Understand ratios: a ratio is one number divided by another, and its value stays the same when both terms are multiplied or divided equally; understand percents as so-many-hundredths of a whole.
Negative Numbers
Meet negative numbers through a thermometer and a number line: above and below zero, positive and negative — and why 0 is neither.
Expressions & Equations
Meet variables with a mystery box and evaluate expressions by substitution, then solve one-step equations on a balance by doing the same thing to both sides.
Intro to Statistics
Understand the mean, median, and mode, and learn to build and read dot plots of real data
Proportion
Understand the meaning of a proportion: an equation stating that two ratios are equal; master its basic property — the product of the means equals the product of the extremes — and decide whether two ratios form a proportion.