I find it quiet surprising that none of these startup classes teach how to do market research and market sizing. Yet when a new batch of startups demo every six weeks, the first thing they talk of is, size of opportunity. Market opportunity is one of the things to consider before deciding on a problem to work on. Please consider adding this info to your classes.

Also, None of them teach how Sam or any YC partner or any VC would approach or start thinking whether a startup is worth investing in or not. That would be hugely beneficial to some of us as it will help us in channeling our thoughts.