Protractor work across four sections for Year 5 maths. Pupils label angles as acute, obtuse or reflex and estimate sizes without measuring, measure four drawn angles, construct angles of 65° and 200° with ruler and protractor, then explain why Amir misread an angle as 140°. The answer key gives acceptance ranges for measured and drawn angles. It checks two England National Curriculum angle objectives.
Geometry - properties of shapes
“Know angles are measured in degrees: estimate and compare acute, obtuse and reflex angles”
Section 1 pairs classification with estimation before any measuring.
Geometry - properties of shapes
“Draw given angles, and measure them in degrees (°)”
Sections 2 and 3 cover measuring and drawing, including a reflex angle.
Classifying angles as acute, obtuse or reflex and estimating sizes by eye.
Four angles to measure with a protractor and record in degrees.
Constructing 65° and 200° with ruler, protractor and arc notation.
Pupils explain Amir's protractor error and give the correct measurement.
Answers with acceptance ranges for graded items.
Skills lesson
Run it as the practice phase of a protractor lesson, one section at a time.
Assessment check
The Amir question catches pupils reading the wrong protractor scale.
Intervention
Reuse the measuring section with pupils whose answers fall outside the ranges.
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