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Within the frame of a study reform project “educationZEN” at the Technical University of Berlin, online educational videos have been introduced in Mathematics for Chemists (MfC) tutorials. In the next phase, those videos were used in an interactive targeted inverted (IGT)-education concept, providing a partial inversion of the traditional teaching. This allowed the students to have more time for active, interactive and peers learning during the traditional tutorials. The IGT-education concept was extended also to new subjects like physical and organic chemistry internships as well as micro-economy tutorials. Short online tests containing questions on the content of these videos ensured that the students watched them before coming to the face-to-face sessions. Iterative correction cycles of the homework were introduced, so that students were able to prepare better for the final exam so that the rate of success reached …