So many times I feel like I need something for my classroom (a worksheet for extra practice, a data collection method), take the time to make it myself, and then find that I needlessly recreated the wheel when I discover that needed resource online!
To help myself be more efficient, I've begun logging sites that hold potentially helpful materials so that I can check-in on a more regular basis.
Here are a few:
ateacherstouch.blogspot.com-- A Teacher's Touch is the handiwork of Linda McCardle, a clever calendar creator to say the least! This is one of my favorite sites from which to pull monthly calendar activities for the classroom. **Added bonus for all you SmartBoard Teachers...she's got things in Notebook format now! (Am I ever jealous!)
teacherspayteachers.com-- Teachers Pay Teachers hosts thousands of teacher-made, ready-to-use downloadable activities, planning resources, and records-keeping ideas for classrooms preK-12. Some resources are available for for free, others you pay for-- and teachers make a little cash from their hard work (as well they should!).
teachersnotebook.com-- Teachers' Notebook is similar to TPT, and has hundreds of great resources. Lots of classroom management ideas available here!
Best wishes and happy hunting!