Intro to Statistics

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The Mean

Stacks of blocks are uneven—level them out by moving blocks from tall stacks to short ones. Watch total ÷ count reveal the mean in every stack.

meanaverageleveling out10min
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Median & Mode

Scattered dots march into a sorted line—tap to light up the middle dot (or two) for the median, and crown the tallest stack as the mode.

medianmodestatistics12min
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Dot Plots

Data cards tumble one by one onto the number line and stack into a dot plot. Read it to find the max, min, range, mode—and in challenge mode, the mean.

dot plotline plotstatistics12min

Related Themes for This Grade

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.

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.