Calendar Math -- Video, templates, explanation...how to use it in the upper grades!
2nd grade calendar
Calendar Math - 2nd grade
great ideas for intermediate grades
http://www.abcand123learning.com/search/label/It All Adds Up
Educational for Kids
Butterfly Fractions. Another way how to learn how to add and subtract fractions with unlike denominators.
Math Teaching Resources
Division of the Day for Upper Grades
Corkboard Connections: Super Math Centers Link Up - Over 20 blogs linked up to this post about management tips and ideas for math centers. Loads of free resources!
Skittles Math Printables for the Upper Grades $
Could do something similar for integrated science and defining the variables for power, velocity etc.
Equivalent Fraction Dash - Math Coach's Corner