Activity in Action:

After taping the flared ends of the straw to the approximate center of the paper plate, use a ruler and cut the straw so it is 2 inches long.

A sundial on the playground with several shadow markings.  Notice chalk registration marks which help students realign sundials for each measurement throughout the activity.

Sundial with markings for 9 am, 10 am, 11 am, noon, and with a student's guess in red pencil for where the shadow will fall at 2:00 pm.