Do you know what has the mass of 1 gram?  The sixth-grade science classes could answer that question!  Working with the triple beam balances, the students determined items that had a mass of one gram, 15 to 25 grams, and 80 to 120 grams.

Nine blocks with the same dimensions labeled A through I: could you place them in order from the least dense to the densest?  Eighth-grade science students certainly tried!  Using the formula D=m/v, the students determined the mass and volume of the nine blocks and calculated the different densities.

Middle School Weights and Measures