Interactive Education: Virtual Manipulatives
Interactive Education: Base 10 Blocks Subtraction
Virtual Manipulatives- great stuff here. Love the work mats and tools #kinderchat
Could do something similar for integrated science and defining the variables for power, velocity etc.
This list is a snap shot in time but sure dynamically change. You can already add www.classpager.com to the list.
What a cool idea!
Butterfly Fractions. Another way how to learn how to add and subtract fractions with unlike denominators.
Math Teaching Resources
Singapore Math manipulatives...printable cards to 1,000...wish I could find higher values! Will have to make 'em, I suppose.
Place Value Puzzles - tens and ones