## Reflection: Real World Applications Engineering Project: Marshmallow Catapult - Section 5: Wrap Up

Applying Practice to Real World Situations:

We have practiced measuring numerous times, reviewed the proper way to measure with every experiment we conduct, and students are still struggling with this practice when using it in real world situations such as this.  Students always want to pull the measuring tape straight, no matter what direction the object measuring to traveled.  I had to remind several groups to measure from the starting point, straight to the object and even had to have a couple of groups start over.  If they do not measure straight to the object, they have a greater chance of making errors in measuring and their measurements will not be precise.

Video 1 of students measuring incorrectly, shows a group begin measuring in a straight line and I stop the video to model for them.

Video 2 of students measuring incorrectly, shows a group begin measuring in a straight line, you can hear me correct them out loud in the video but they continue to measure in a straight line anyway.  I had to stop the video once again for this group to model the correct way to measure.

Real World Applications: Measuring Accurately

# Engineering Project: Marshmallow Catapult

Unit 1: Scientists at Work
Lesson 14 of 16

## Big Idea: Students will act just as real scientists by working through the engineering design process to plan, build, and a test a catapult they made from craft sticks and rubber bands.

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120 minutes

### Jennifer Sallas

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