What to teach a newbie.

Hey all... I don't really consider myself much of a SQL Server Guru yet. However, my company wants me to start teaching a web developer the basics of SQL Server. I have about an hour with him tomorrow, and am at a bit of a loss on what should be covered. I've already pointed him to a good SQL reference book and was thinking on working him up to various "challenges" where I'll give him a handful of tables, and ask for a query that generates a given output.

That all being said, what specific things do you all think a (relative) newbie of SQL Server *NEEDS* to know?

thanks for your help.