In July 2022, two PhDs of our Thin Films and Interfaces (TFI) Group offered a practical teaching module to pupils at the Kantonsschule Stadelhofen as part of the Swiss TecDays. These are one-day events at Swiss grammar schools, organized by the Schweizerische Akademie der Technischen Wissenschaften (SATW), to support and strengthen technology education at schools. By bringing together pupils and experts from industry, universities, or research institutions, TecDays aims to raise an early awareness for technology and science.