Here are Subtraction Strategies Posters to download (for Free! -from step into second grade)
Touch Math poster I made for my class!
Second Grade - Even and Odd Numbers - Even Steven & Odd Todd Anchor Chart
Could do something similar for integrated science and defining the variables for power, velocity etc.
Using doubles to count on
math: adding, subtracting, multiplying
Addition and Subtraction Strategy posters free!
Snap Cube Number and Pattern Cards! Such an awesome resource for my preschooler!
Best of EBA Bloggers
Use a three part plate to work on part, part, whole and addition concepts