STEM in Design is aimed towards the Australian Design Technologies Curriculum. This unit guides the teacher and the student through a workbook approach designed scenarios. The unit introduces students and teachers to the Arduino programming system. Students learn how to control a system of traffic lights. The booklet includes prior scaffolding activities to help develop student and teacher learning in programming a system used in everyday life. Units includes: • Australian Design Technologies mapped to proficiency scales • intervention and formative feedback points • class Learning Goals developed from the Australian Design Technologies Curriculum, • Step by step design process explained. • 10 weeks in length, 3 x 70min lessons each week. • Practical design challenge to build a scale model • Unit plans, Marking criteria, Literacy and Numeracy marking criteria • Students gain an understanding about the design process.