Lecture 3 seems really full, and the topic of assignment tests only makes sense in the context of discrete populations, hence it may be a good idea to move that topic to lecture 4?

I think assignment tests can be covered well in lecture 4. 

One thing that would be very helpful in lecture 3 would be a slide/table with assumptions of the different distance measures (HW assumptions, other, no assumtions made) and what that are based on (heterozygosity, alleles, or allele frequencies).  It is crucially important that students start thinking about what these distance measure mean and the underlying assumptions so they can make informed decisions with their own data.  I would also like to see proportion of shared alleles added.  Both Sam and I talk about this distance measure later in the seminar, so it would be helpful if it was introduced/compared in this lecture.