ReadWriteThink
Read Write Think: Draw a Math Story From the Concrete to the Symbolic
Contains plans for four cross-curricular lessons that ask young scholars to write simple addition and subtraction stories after reading a number of models. In addition to objectives and standards, this instructional plan contains links...
AAA Math
Aaa Math: Adding Three Digit Numbers
Read through this explanation of how to add three digit numbers. Use the online game to practice this skill. The game will keep running totals of your correct and incorrect answers. It will also show you a percent score of the correct...
Other
Pre K Pages: What Is Subitizing? Activities for Preschool and Pre K
Math researchers have identified the ability to subitize as an important part of developing basic number sense skills. This site explains the difference between perceptual and conceptual subitizing and gives concrete ways to practice...