finished first four lectures

I have finished the first four lectures. One fascinating pointer I received was on student understanding of what happens when you put a conductor in an E-field. Many students think that the conductor "blocks" the E-field instead of analyzing it by superposition, i.e there are two sources of E-field, the first being the external field, the second being the field formed by the charges that are induced on the conductor. The total E-field is then zero inside, if it was finite the charges would still move