Theory of science

Today and also yesterday I have done a lot of studying. I have to do a online course of "Theory of scince" and it ain't easy. So I have been thinking and reflecting my philosophical position on the field of science, what is my perception of truth, knowledge, theories, models, definitons etc. I have now complited 6/10 assignments.. oh I can not wait that this course is done, not my favourite part of the phd studies...