Planning and Activities
Day 1 Teaching
Pairs discuss how to explain the radius, circumference and diameter to someone with no diagram. Agree the definitions. Describe relationship of diameter and radius as a ratio (2 to 1, 2:1). We will explore whether there is a similar relationship between the circumference and diameter.
Use the ‘Ellipse in a Circle’ in-depth problem-solving investigation below as today’s group activity.
Or, use these activities:
-- Children draw circles, measure diameters and circumferences with string and work out ratio. Pi is introduced.
Day 2 Teaching
Children draw different quadrilaterals and describe them. Together identify their features then name the different types of quadrilateral. Classify these according to their properties.
-- Children make a range of quadrilaterals using art straws. Copy into books and identify features. Sort with sorting tree or Venn diagram.