Short Blocks

Maths Year 5 Spring Shape (B)

Each unit has everything you need to teach a set of related skills and concepts.

Recognise, measure and draw angles (suggested as 2 days)

Planning and Activities

Day 1 Teaching
Using an online protractor, show how to align the protractor to read the angle. Point out how the numbers of degrees go both anticlockwise and clockwise; this is the case on many protractors! Measure angles of 90°, 180°, 270°. Show different angles for children to estimate then measure.
Group Activities
Use the in-depth problem-solving investigation ‘Nine-pin triangles’ from NRICH as today’s group activity.
Or, use this activity:
-- Accurately draw and measure angles.

Day 2 Teaching
Introduce acute, obtuse and reflex angles.
Launch ‘Angles’ from Scroll down to 'Try it yourself' and move the top line of the angle anticlockwise to gradually increase it from 1° to 360°, asking children to watch the angle titles at the side. Draw some angles, and children classify them as acute, obtuse or reflex.
Group Activities
-- Classify angles as acute, obtuse or reflex through shape investigation.

You Will Need

  • IWB and internet access
  • Whiteboards
  • Rulers
  • Protractors
  • 1–6 dice

Mastery: Reasoning and Problem-Solving

  • Draw an acute angle, estimate its size. Write your estimate. Then measure it. How close were you?
    Repeat this for an obtuse angle.
  • Draw a pentagon with two right angles and two obtuse angles. Can you draw a pentagon with three acute angles?
  • True or False?
    A quadrilateral could have two reflex angles.

In-depth investigation: Nine-pin Triangles
Draw triangles; measure and classify the angles of each triangle. Nine-pins Triangles from

Extra Support

Ask the Angle!
Recognising acute, right and obtuse angles.