Grade 1 · Measurement
Direct Measurement with Non-Standard Units
Non-standard measurement in Grade 1 teaches the logic of all measurement: choose a unit, repeat it without gaps or overlaps, count the repetitions. The critical conceptual advance is discovering why uniform units are more useful than non-uniform ones. When different students measure the same desk with their hands and get different answers, the motivation for standard units becomes obvious and compelling, not an arbitrary rule imposed by the teacher.
LESSON VIDEO
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Lesson video
A short walkthrough to play in class or assign for flipped/at-home viewing.
WHAT STUDENTS WILL LEARN
✓Measure length using both non-uniform units (hands, feet) and uniform units (cubes, paper clips)
✓Explain why uniform units give more consistent measurements than non-uniform units
✓Apply the baseline principle: measurements start from the same point
✓Iterate a single unit to measure length: move it end-to-end and count the iterations
✓Tile an area with a unit shape to find how many units cover it
✓Use body measurements, connecting to First Peoples traditions of hand and foot tracing