Fun STEM for the last week of school!
Your marble run challenge is to build a marble run that will keep the marble rolling for at least 15 seconds.
Criteria:  The marble run must stay attached to a wall or vertical support board. The marble must smoothly follow the path without stopping or falling off the run. The marble must roll continuously for at least 15 seconds.
Constraints:   Materials -Use only the cardboard materials provided, masking tape, glue, and scissors.   Time - Design must be planned, built, tested, evaluated (reflection #1), revised for improvement, and retested within 3 one hour sessions.

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