These hundredths disks are an interesting decimal model, although certainly not adequate as the students’ only model.

They usually show decimals to the hundredths, which is not required in grade 4. However, they can be used to the tenths.

Two disks are cut out and joined together. In the resultant model, one disk can be rotated to show decimals less than one. The disks are marked to show tenths as well as hundredths. |

One limitation is showing decimals greater than 1.

They are however useful for looking at two decimals that add to a whole, as the two parts are always evident.

Photocopy two of these onto cardstock for each model. Two different colours are needed. |

I am a 4th grade teacher and was in need of a good hundredths disk, and saw yours.