Collection and processing the data in accordance with the principles of personal data protection (photos of pupils, documentation with pupils' names etc. must not be involved; you can document, for example, observation sheets, interview transcripts, scanned notes from a notebook, didactic tests without possible identification of the pupil...). List them in the portfolio task document:

4.1 Method 1. (data collection, data documentation, interpretation of findings)

4.2 Method 2. (data collection, data documentation, interpretation of findings)

4.3 Method 3. (data collection, data documentation, interpretation of findings)