Grade 3 Math lesson plan: Fractions on a number line
Topic: Fractions on a number line (3.NF.A.2). Adjust the settings, then copy the prompt.
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Planning notes for this lesson
Prerequisite skills to check: partitioning circles and rectangles into equal shares (2.G.A.3); whole numbers as lengths from 0 on a number line (2.MD.B.6); a unit fraction 1/b as one of b equal parts of a whole (3.NF.A.1).
Key vocabulary: fraction, numerator, denominator, unit fraction, number line, interval, equal parts, whole.
Warm-up idea: Tape a long strip on the floor from 0 to 1. Ask a student to stand at one half, then ask: how do we know that is really halfway? What would we have to do to find one fourth?
Exit ticket idea: Students partition a 0-to-1 number line into sixths and label every mark, place 3/4 on a blank number line, and explain why 1/3 sits closer to 0 than 1/2 does.
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