The Mental Hurdle
Even though some of them have lived in a three-dimensional world for more than a decade, most elementary students don't understand the depth element of drawn plans. The implied Z axis is not instinctive. They understood that our cubby units would be 70 inches high and 42 inches wide, but they didn't understand that the plans sunk down into the paper 25 inches.
Some of the teams still weren't getting the Z axis, so I built a small section of it in Tinkercad and printed-out the parts from our 3-D printer. That way, they could see and feel the way the parts looked and fit together.
|3-D Z-axis mental aid.|
Basic drafting, measurement unit, cardboard construction technique and practical arithmetic levels: Achieved!
By virtue of a check from our Home and School Club and the transport help of our pick-up truck-owning 5th-grade teacher, the raw materials were in-house.
|The lumber arrives.|
Next up: Practicing technique with the real stuff. We still had some 3/4 and 1/2-inch MDF left over from the workbench construction, so we'll use that to practice router techniques, measuring and cutting and the "screw and glue" construction method.