Abstract
Active learning and an experiment and practical work in physics education is supposed to positively influence educational outcomes.
However, online teaching seems to restrict typical ways of practical work. Firstly, we focused on educational goals connected with topic of anaglyph photography in physics education. 3D photos are now popular among students and anaglyph is cheap and simple way how to create it.
Principles of 3D vision and colors and filters are the two main issues which we can discuss within the topic. Secondly, by means of the action-based research we reflect carried out workshops where almost 40 % of the total time was spent on students' practical and experimental work in on-line distance form and compare the online workshop to similar offline course in previous years.
Twenty high school students participated in 8 hours long courses within non-formal education. As to workshop reflection, firstly we emphasize the opportunity to get an idea of students' previous knowledge of the topic, their expectations, familiarity with the software, etc.
Secondly, we share ways to put students' experimentation and practical work in teaching praxis in online form.