The first is a new collaborative blog started by some excellent teacher bloggers I follow:
Here you will find a ton of lesson ideas that are all aligned to the common core standards. You can either search by standard on this site or by your grade level. The blog just started, so it doesn't have too many resources yet. However, it seems to be growing everyday with some really high quality stuff and lots of freebies that you can use in your own classroom.
The creators have also made a companion site specifically designed for parents and also those who homeschool:
Another site I love to use is ClassDojo.
One of the best features: Class Dojo links up with your smart phone so that you can use it as a classroom remote. I'm not tied to my computer if I want to give a student a point. I can reward them when I'm on the other side of room!
This year, my team is going to use Class Dojo to keep track of points for a weekly raffle. Every five Class Dojo points will get each student a raffle ticket for the chance to win some fabulous Target Dollar Spot prizes. We can also work into our raffle discussions of probability and percent chances to win.
What are other amazing sites that you find helpful in your classroom?