Propositions1. All laboratory classes should at least partially be replaced by virtual experiment environments (this thesis).
Teachers should use design principles instead of intuitionwhen designing new learning materials (this thesis). 3. All curricula should include a course on learning psychology.4. The answer options 'agree' and 'totally agree' in questionnaires should be renamed to avoid differences in interpretation. 5. Scientists are not teachers. 6. The COVID-19 pandemic was a blessing for laboratory education.