This is the second lesson in the ‘App Inventor’ scheme of work. This lesson introduces learners to being able to apply drawing tools in ‘App Inventor.’ Learners will code a solution to a given problem and will apply computational thinking skills. All lessons within the scheme are targetted at KS3/KS4 and appropriately mapped to elements of the Computer Science 9-1 GCSE. Each slide includes detailed notes to support teacher understanding and have been based on a lesson plan structure. There is no prior knowledge required from the class teacher. Using the ‘App Inventor’ emulator or a mobile device with the 'MIT App Inventor app ’ installed will allow learners to practically use the apps they build. The app can be downloaded freely from the ‘Google Play’ store.