I made this photomontage in a course about free art and design software. And now... I do not know for sure if I will ever use photoshop with my pupils again after getting to know photopea tonight.
It is a free online solution and I think I can do with it everything I used to do with photoshop with the kids, it is even better than the old photoshop version we've got at school. Besides this it is very similar to PS, so it will be easy for those who will change from photopea to photoshop later in their life.