Our WG members Susan Ulses and Jessika Boer held a teacher training session on the experiments from our ChemOL student laboratory as part of a seminar session in Buchholz. A total of eleven teachers in the preparatory service participated in the session. Experiments on the topics of fire and combustion, water and salt, air and carbon dioxide, as well as substances in everyday life were carried out together with the prospective teachers and professionally processed.