KS3 - Using tints and tertiary colours to paint a Georgia O'Keefe response

This is a lesson designed to introduce tints and practice colour mixing to create a Georgia O'Keefe painted response. Students will use two colours and white to mix a range of secondary, tertiary and tints to build tone in Georgia O'Keefe's flower.
The lesson includes: a starter or 'hook' question; objectives; differentiated learning criteria; an oil pastel extension; an 'apex' challenge for most able students; pre-drawn printable flowers for lower level students and step by step painting and colour mixing help sheet which can be printed back to back. It can be used over a double lesson or would easily stretch to two lessons.