Fractions as equal parts
A fraction compares selected equal parts with the total equal parts in a whole.
Explore the lesson →Learning path01 02 03
Build understanding one idea at a time.
Read in order or select a topic. The suggested grade range is 4–7; educators should assess suitability for their learners.
Ratios and unit rates
A ratio compares quantities.
Explore the lesson →Area and perimeter
Perimeter measures distance around a boundary; area measures surface covered.
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