### Teaching and Group Activities for Understanding

**Day 1**

Show a clock face on the IWB. Where does the minute hand point at quarter past? At half past. Quarter to? Draw lines to split the clock into quarters. Shade a quarter section. This is a quarter of the clock face. What’s the angle between the lines? [a right angle; 90 degrees; 90°]. Draw a right angle. A right angle is a quarter turn. Repeat to identify a half turn and a three-quarter turn. Note that the clock hands turn clockwise. Turning the other way is anti-clockwise.**Group Activities**

-- In the hall or an outdoor space, give instructions to practise making quarter, half and three-quarter turns.

**Day 2**

Show a picture. Close your eyes. Turn it 90° clockwise. Open eyes, what have I done? You have turned it through a right angle, a quarter of a full turn. Repeat, turning it through 2, then 3 then 4 right angles, both clockwise and anticlockwise. 2 right angles is half a complete turn, 4 right angles a complete turn.**Group Activities**

-- Create patterns by rotating an irregular shape through successive right angles.

-- Create patterns by rotating a shaded 3 by 3 grid through successive right angles.

**Day 3**

Draw a square and a rhombus. Which is a square? All the sides in each shape are the same length. Observe how each angle in a square must be a right angle. Show a large set square and how a ‘square’ corner is a right angle. Compare angles in the square and rhombus against the right angle of the set square.**Group Activities**

-- Find examples of different types of angle in the classroom and around the school.

-- Classify angles <90° as ‘acute’ and >90° as ‘obtuse’.

**Day 4**

Use the range of shapes on ‘Perpendicular and parallel lines’ (see resources) to explore lines that are vertical, horizontal, perpendicular and parallel. Look for examples of these around the classroom.**Group Activities**

Use the ‘My square, not yours!’ in-depth problem-solving investigation below as today’s group activity.

Or, use these activities:

-- Sort shapes into a Venn diagram based on their properties.