Short and sweet. If you bookmark only one teacher website, let it be this one: Richard Byrne's Free Technology for Teachers.
1. It's free.
2. It shares free stuff.
3. It's written by a teacher for teachers.
4. It always shares the free stuff, plus it explains applications for your classroom (what + so what).
Take a look at today's free tech, here.
Take a look at Richard's Twelve Essentials for Technology Integration.