### Teaching and Group Activities for Understanding

**Day 1 Teaching**

Draw a point on the board and four equal length lines coming from it. Use an IWB protractor to measure three of the angles; then work out the fourth. Read from the correct scale! Children work out the missing angles in a triangle and angles around two intersecting lines.**Group Activities**

-- Solve geometry problems to find missing angles. Investigate general statements about angles in triangles.

**Day 2 Teaching**

Use the online Transformation game. Children write the co-ordinates of the house. Share today’s top tip for remembering the order to read/ plot co-ordinates. Children discuss, in pairs, which mirror line is correct, and where it needs to go on the grid. Click on ‘Reflect’ to check. What are the new co-ordinates of the house? Repeat for translation. Is there a pattern in the way the x and y co-ordinates changed each time?**Group Activities**

-- Place and transform a shape on a co-ordinate grid. Give instructions to the rest of the group to make their shapes finish in the same position.

**Day 3 Teaching**

Children work in groups to write a description of a given 3-D shape, e.g. number and shape of faces it has, number of vertices and edges. They then draw a net of the shape. The rest of the class guess their shape from the description, confirming by looking at the net.**Group Activities**

-- Visualise 2-D representations of 3-D shapes. Make nets to test whether they form open cubes.