Fraction × & ÷
Understand fraction × integer and fraction division: multiplying an integer means adding that many copies — numerator × integer, denominator unchanged; dividing by a number equals multiplying by its reciprocal.
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.
Intro to Statistics
Understand the mean, median, and mode, and learn to build and read dot plots of real data