Colorín Colorado
For families and educators – everything from Math or Language Arts
http://www.colorincolorado.org/article/30570

everythingESL
Content based lessons for beginners through intermediate
http://www.everythingesl.net/lessons

Mrs. Hurley’s ESL
Lots of great resources – lessons, activities, additional websites
http://mrshurleysesl.com/teacherresources

Math Wizard
Printables by grade level and ability
http://www.mathwizard.net

Kidsolr
Online explanations of common concepts such as fractions, time, weather, etc.
http://www.kidsolr.com

EL Civics
Social Studies related materials
http://www.elcivics.com