The document analyzes video recordings of case studies conducted with 95 teacher trainees in the Czech Republic. Case studies involve trainees simulating teaching situations. The analysis found that trainees struggle with self-reflection when comparing their ideal self to recordings, most don't check their language or control their behavior, and few can adequately address conflicts. Overall, case studies were found to contribute to trainees' professional development, though trainees often rely on traditional teaching methods rather than modern approaches.