I'm a little frustrated with the quantum m lectures I've been watching. I've watched Susskind's, one in India and now James Binney's, as well as read about 3 books. They all teach this Bra-ket notation and in none of the three books I have on worked problems do they every give you a chance to practice these principles. Is it because Bra-ket notation is so easy? Am I supposed to have already mastered it in some other mathematics course? I've gotten up to Binney's fourth lecture and I can't even do one QM problem yet. This is crazy. All of the principles he's outlined on the chalkboard, nowhere have I been given any opportunity to practice them. I also looked on the web putting in google bra-ket notation problems and answers and i couldn't find anything. I'd like to know why am I not being tested on the principles introduced? It seems basically axiomatic that when you introduce a principle in phys or math that you then test the reader to check if they understand.