I like the non-standard unit activities I found online They are motivating and good reinforcement of what students learn with objects in class. I like that many of them have estimating as a part of the process of measurement.
Linear Measurement - Using Multiple Copies of a Unit
Linear Measurement - Compare and Order
- Long and Short
- Tall and Short
- Count Us In - Game 14 (height) put the people tallest to shortest
- Measuring Up
My students do math centres about once a week. Two centres are always the same. One is a journal centre, where they work with me in small groups. One centre is a netbook centre where they are assigned Mathletics activities or they go to my webpage* (msmondor.wordpress.com) and work on websites I post there. The third centre changes depending on the needs of the class or the unit we are studying.
* I wrote a post about having a class website if you are interested in this.