After measuring with meter sticks and then finding the decimeter measurement of our classroom one day, we then worked on matching metric measurements.

Students were in groups of 2-3 students to complete this math activity.

**Metric Conversions Matching Activity Steps**

2) Students set up “Meter,” “Centimeter,” and “Millimeter,” headings on their boards, and then had to determine which measurements to put in which categories, so that the measurements in each column would be equivalent.

**For example,** they had to place the cards 7, 700, 7,000 under meter, centimeter, and millimeter, respectively. (Example in picture.)

I used several similar numbers, so students couldn’t just go by the initial digit to match the numbers:-) Most students did a good job with this, placing the numbers in the appropriate columns.

**After the Metric Conversions Matching Activity**

Most students used the poster pictured here to be sure that they place their decimeter column correctly. I believe every group in every class had their decimeter measurements correct….they did a great job figuring this out together!

After having their decimeter measurements checked, students had to make observations of the numbers in each column….

- how did the numbers change as they moved from one column to another,
- what is the relationship between the numbers?

These observations were written in their journals. Some observations were:

- “The numbers get bigger as the units get smaller”
- “Every time you move right, you add a zero (except when there’s a decimal)”
- “Multiply by 10 every time you go to the right.”

The class observations got better later in the day (because those kids had science before math and had gotten some additional information!) Hopefully, getting this information in two different classes, in two different ways, will help the students to have a better grasp of the information than they have in the past (usually this info is just taught in science.)

The Metric Matching, which you can download below, has 2 different sets of 21 cards; I used the first page last week and used the second, more challenging page, today.

You can also grab some **free metric problem solving in my follow-up post** to this one, where I share the 2nd day of the metric matching activity:-)