1. STEM: Inquiry, Connections, Redesign
David Huls, Seth Nelsen
Pam Branlund
Lakeville South High School

3. By 2014, students will need a strong foundation in STEM fields to compete for tomorrow’s jobs

4. The graduates of 2023 will be competing in the global marketplace
These graduates are today’s kindergardeners

5. The Process of Implementing STEM
Design Projects
MEAs - Model Eliciting Activities
Redesign
Integration

6. Lesh Translation Model
Lesh translation model as a guide for curriculum development.
Classroom teachers can use the Lesh translation model to guide how they implement district-adopted curriculum within their classrooms.

7. Design Projects Windmill Project Introduction to Engineering Projects
With a set budget and prices for materials and tests our groups were to get the highest voltage output possible.

8. Design Projects “Save the Penguins”
Using various materials and a budget, the task was to keep an ice cube from melting in a very hot atmosphere.

9. Model Eliciting Activities
MEAs
are designed to encourage students to build mathematical models in order to solve complex problems
Who’s the fastest runner?

10. Model Eliciting Activities
????

11. Redesign Activity Redesign blades Experiment with gear ratios
Windmill Redesign
Redesign blades
Experiment with gear ratios
Consider limitations of testing with a fan

12. Across Subjects
Projects can bring in aspects from every subject. From technical writing; to visual arts; to math and science

13. Activity Make Some Bubbles
Using the materials provided you are going to assemble a device that can cause electrolysis of water
A company might use this process someday to fill hydrogen powered vehicles
2 H2O(l) → 2 H2(g) + O2(g)

14. Tinkering vs Following
Half of the groups were given no instructions and allowed to explore on their own.
The other half were given instructions and told how to assemble the device.

15. Activities We Implemented
Clearing a Path to the Heart
Cereal Box Redesign
Barbie Bungees
Submarine Design

16. Clearing a Path to the Heart
Goal was to improve the flow of blood through a blocked artery
Used everyday materials to reduce the blockage

17. Clearing a Path to the Heart

18. Cereal Box Redesign
Measure the dimensions of a cereal box and determine the volume and the surface area
Redesign the box to contain the same volume but with less surface area
Calculate savings in material used
Discuss benefits of redesign

19. Barbie Bungee Jumping
How many rubber bands are needed to have Barbie bungee jump closest to the ground without hitting her head?
Derive an equation for the number of rubber bands needed for various heights
Discuss accuracy of equations

20. Submarines Design a submarine to: float - sink - float or
sink – float - sink
- Incorporated many topics from physical science.
- Students notions about when something will sink or float are challenged.

22. Redesigning “Canned” Labs
Take the instructions away and give a clearly defined question.
Results will vary, but students do a lot more thinking and tinkering

23. Directions Read Carefully
Title: Friction Lab
Purpose:
To determine the relation surface type to friction force
to determine the relation of mass to friction force
to determine the relation of surface area to friction force
Hypothesis 1: Friction force is __________ related to mass.
Hypothesis 2: Friction force is __________ on smooth surfaces than on rough surfaces.
Hypothesis 3: Friction force is __________ related to surface area.
Materials
wood blocks
spring scale
surfaces (table, linoleum floor, lab table, rug)
balance
Procedure:
Part A: Relation of Mass and Friction
Determine the mass of each block.
Attach a spring scale to the block and pull.
Read the scale to determine the friction force between each surface and each type of block. (remember that the friction force between a block and a surface equals the force you need to exert to move the block at constant velocity)
Record your data in a data chart!
Put one block on top of the other (doesn’t matter which types) and add the masses.
Determine the friction force again for the different surfaces.
Record your data in a data chart.
Repeat with 3 blocks
Directions
Read Carefully

24. Friction Lab
Using the equipment provided at your lab stations, answer the following questions.
Does the type of surfaces touching each other effect the force of friction?
Does a change in surface area of like surfaces cause a change in the force of friction?
If the force of friction the same for when an object is moving versus just before it begins to move?