These tips are supported by research evidence that meets What Works Clearinghouse design standards and are based on a practice guide authored by a panel of experts: Robert Siegler, Thomas Carpenter, Frances (Skip) Fennell, David Geary, James Lewis, Yukari Okamoto, Laurie Thompson, and Jonathan Wray. To learn more about this evidence base, read the practice guide, Developing Effective Fractions Instruction for Kindergarten Through 8th Grade (
https://ies.ed.gov/ncee/wwc/practiceguide/15).