## Friday, October 17, 2014

### A paper clip and a dictionary

This week 3rd grade focused on understanding grams and kilograms. The students learned that a large paper clip weighs approximately 1 gram and a large dictionary weighs about 1 kilogram.

Partners chose items from around our classroom to weigh using paperclips.  They recorded their answers on a table.  We then weighed the same object using grams counters. The students discovered that the paperclips only gave them a good estimation of an objects weight.  They determined that using gram counters was a much more accurate way to weigh objects.

The 3rd graders completed a second activity using kilograms.  They found objects around our classroom that they believed would weigh close to 1 kilogram.  Thinking about how the large dictionary felt guided their object choice.

Allowing the students to weigh objects gave them a better understanding of grams and kilograms. The students had a wonderful time figuring out that a marker cap was 1 gram and their science textbook was over 1 kilogram. It’s a good thing they don’t take their science book home!