The paper deals with the preparation of a draft project for secondary school students on the theme "Become a detective." This is a complex project that is focused not only on the information of biology and chemistry, but also for forensic analysis. The project is designed as a search puzzle game, where the goal is to identify the offender.
The project is developed including worksheets to copyright solution for teachers. The project has been tested and verified 2013 in the laboratory of the Department of Teaching and Didactics of Chemistry, Faculty of Science, Charles University in Prague.
The project involved 13 pupils from high school.