Website review

I spent about an hour on the website that I was excited about previously (Russian one), and that was enough time to realize the inefficiencies of its practice methods.

Asking the user to write queries that produce certain results is a great idea, but there was no object explorer nor explanation of the tables/data.  Merely stating "table a includes columns x, y, z" write a query that produces this result....

A great idea for a site, but again inefficient. 

Turning my attention now to microsoft a virtual lab website which looks great, but doesn't work on Mac, needs to work with .net framework. 

I'm also looking for an educational app for my iPhone to help learning tsql. Currently I just browse sqlservercentral.com