I would recommend MIT 8.04 Quantum Physics I, Spring 2013 Allan Adams to anyone wanting a really clear introduction. Excellent teacher.
I would like to know if the experiment, with the electrons gong into a 'harness box (Y axis spin detection ) after being pre-selected from colour box (X spin axis detection) and then the two paths deflected by mirrors meeting at a path joining mirror, has a name. How should the experiment be referred to without giving a long winded description like the one I have just given ? Does it have a name? or should I draw a diagram?