1st Grade: Constructing Walls with Earth Materials

First Graders recently completed their FOSS unit called Pebbles, Sand, and Silt.  To conclude this unit, they studied the Great Wall of China and how earth materials were used to construct it.  Students planned, prototyped, and tested their own walls made out of rocks, pebbles, sand, and clay.  Each wall needed to be strong and withstand multiple strikes with a "wrecking ball".  The groups with the strongest walls were hit up to 30 times!