I am moving to fourth grade. Are there any math manipulatives that would be helpful to have? I taught fifth grade in the past so I know most of the helpful resources, but thought it wouldn't hurt to ask what others find helpful with fourth grade Common Core math. We currently have resources from the enVision Math kits. However, we tend to create our own resources for instruction. I have already picked out a set of fraction towers and magnetic base ten blocks. I have $75 to spend from my school district and thought recommendations could be helpful.