The second project was designed for 3 students from Ecole Technique Supérieure de Chimie de l'Ouest in France for two months. They exchanged to AAU with the support of Erusmus+ project for 2-month traineeships in the winter of 2022. They were in the level of 2 nd year of the 'brevet de technician supérieur' (an equal of the second year in college). They applied for the internship in our lab to gain some experimental techniques in organic synthesis. As they had taken the organic chemistry course in France, thus they were grouped into a small PBL group. A PBL project (Project 2: Synthesis of a peptide aldehyde) in organic chemistry was designed for them. The research goal set for them is to synthesize a peptide aldehyde with the amine and aldehyde group protected (Thr-Phe-Thr-Phe-acetal) in the solution phase (Figure ). The synthesis included suitable protection of the N, and C-terminal, amidation reaction, converstion of weinrebamide to aldehyde and further protection of the aldehyde by converting aldehyde to dimethyl acetal. The main traning goal was to promote the understanding of the basic principles in organic chemistry in addition to the training of organic synthesis skills.