Design Thinking is known as a process to create ideas and new applications. We were curious about the results when it was applied to the challenge of developing teaching materials for a non-profit project to support CS and IT (information technology) in schools from late primary to secondary schools. Therefore it had to take into account many different teachers and other actors. Our aim was to create usable and meaningful material that most teachers would like to teach with in their classes, regardless of their background or experience or knowledge of CS. Therefore it had to be interesting and powerful and at the same time easy to use and understand. And it also had to be motivating and inspiring for students aged 10 to 16. In this paper we report on our process and first insights. We also present some categories of teaching materials that came up during this process and personas of teachers. These may be helpful in other similar projects as well.