Laura Candler's Reading Workshop page. I can't say enough good things about Laura. She is an outstanding teacher who has shared many great resources. She does sell materials, but offers much for free. Check out her file cabinet! This page has many free RW resources, including a webinar.
This site provides an extensive collection of free resources, math games, and handson
math activities aligned with the Common Core State Standards for Mathematics.
Our math printables are suitable for use in math centers, small group or whole class
settings. Instructions for each activity are presented in large print on a task card in
child-friendly language to enable students to work on tasks independently after a brief
introduction to the task.
All materials and activities on the site are designed to support the Common Core
State Standards and are based on the belief that effective mathematical learning is
best achieved when students are given frequent opportunities to develop their own
problem solving strategies, to pose questions, and to engage in mathematical inquiry
through the use of open-ended tasks.
Another great resource from Laura Candler. Includes some free resources, including a webinar. The things she has for sale are pretty reasonably priced.