### Planning and Activities

**Day 1**Revise symmetry. Children discuss and identify lines of symmetry in regular and irregular shapes.

**Group Activities: T with Y3**

Y3 -- Identify whether shapes are symmetrical. Draw the lines of symmetry on 2-D shapes. -- Draw one half of a shape for a partner to complete symmetrically. Begin to explore shapes with two lines of symmetry.

Y4 --Identify whether shapes are symmetrical. Draw the lines of symmetry on 2-D shapes. -- Identify lines of symmetry in regular and irregular 2-D shapes.

**Day 2**Use the ‘Hamilton clock’ as basis for modelling quarter and half turns, clockwise and anti-clockwise.

**Further Teaching with Y4**

Children discuss and compare sizes of five displayed angles, then classify as right, acute or obtuse.

**Group Activities: T with Y4**

Y3 -- Follow and give instructions to practise making quarter, half and three-quarter turns.

Y4 -- Recognise and compare acute and obtuse angles and right angles.

**Day 3**Explore images and patterns turned through successive right angles.

**Further Teaching with Y4**

Revise names and properties of the different families of triangles.

**Group Activities: T with Y3**

Y3 -- Create patterns by rotating shapes through successive right angles.

Y4 -- Explore the angle properties of different types of triangles.

**Day 4**Model using IWB set square to find angles greater or less than 90°; use vocabulary acute and obtuse.

**Group Activities: T with Y3**

Y3 -- Find examples of different types of angle in the classroom and around the school. -- Classify angles <90° as ‘acute’ and >90° as ‘obtuse’.

Y4 -- Investigate the angle properties of quadrilaterals.

**Day 5**Model parallel and perpendicular lines using examples around the room.

**Further Teaching with Y4**

Explore properties of quadrilaterals; name them. Sort into a Venn diagram.

**Group Activities: T with Y3**

Y3

*Use the ‘My Square, Not Yours!’ in-depth problem-solving investigation below as today’s group activity.*

*Or, use this activity*

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

Y4

*Use the ‘Rabbit Run’ in-depth problem-solving investigation from NRICH as today’s group activity.*

*Or, use this activity:*

-- Compare and classify quadrilaterals, based on various properties.