Lesson 3
Part 2

Marvelous Machines: Making Work Easier

Using Simple Machines (2) / Grade 5 / Wilmington, NC

The EIE Curriculum

EiE - Marvelous Machines: Making Work Easier, L3 Part 2

Students use simple machines and spring scales to determine how much force is needed to move a standard load and think about the ergonomics of using each machine.

Reflection Questions

Where did you see students needing support while at the testing stations?

Many students needed reminders about trying to keeping measurements accurate—making sure to move the bottle a full 6 inches or to take readings while moving the bottle.

  • A group is reminded to lift the bottle a little more in order to reach the 6 inch mark. (3:04)
  • A group is reminded to pull the bottle all the way up the board and to read the spring scale as they’re pulling. (3:54)

What unique assessment opportunities do Ann’s interactions with do small groups provide?

When talking with small groups, especially at the data analysis stations, Ann is able to see how they are answering questions on their handouts and ask probing questions to better understand their thinking.

  • Ann asks one student a question similar to what is on the worksheet, but words it in a different way. The student is able to correctly answer this question, indicating a working understanding of the idea. (4:20)
  • Ann talks with a student who is confused at the pulley station. She’s able to ask him questions about the differences between the single and double pulley, focusing in on whether one station has more rope than the other. (6:53)
  • Ann talks with a group about the trade-offs at the pulley station. Through her questioning, they come to the idea that the more rope (the longer the distance) the less force (the easier it is) to move a load. (6:33)