![Marble run prototype](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Marble_run_prototype.jpg?itok=EwWmTwaO)
Design & Build a Marble Run
Lessons
Students will work collaboratively to design and build a marble run that meets specific criteria.
![Rattle drum](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Rattle_drum.jpg?itok=78KCsKh-)
Design & Build a Musical Instrument
Lessons
Students will learn about the properties of sound as they design, test and build a musical instrument.
![Catapult near Castle Saint-Angel, Italy](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/Catapult_Italy.jpg?itok=IRuk9s_f)
Design & Build a Ping Pong Ball Launcher
Lessons
Students work collaboratively to design and build a device that uses simple machines to launch ping-pong balls.
![Skyscrapers](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/Skyscrapers.jpg?itok=HXAo4mHr)
Tall Towers & Sustainable Cities
Lessons
Students will design and build a model apartment building and learn how buildings such as these can be a solution for suburban sprawl.
![Wooden toy train](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Wooden_toy_train.jpg?itok=5Jn1_Kkv)
Design & Build a Toy that Moves
Lessons
Students will work collaboratively to design and build a toy that is moved using forces applied by magnets.
![Hand with screwdriver “repairing” DNA](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/DNA_repair.png?itok=jwH_hm9z)
DNA Damage and Repair
Backgrounders
This backgrounder explains the different ways that cells repair damage to DNA.
![Man being struck by lightning](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Lightning_striking_man.jpg?itok=equuGqYC)
Do Amps or Volts Kill You?
STEM Explained
This resource explains electricity basics - volts, amps, currents, resistance, and why it is dangerous to touch electrical outlets with wet hands.
![Woodpecker on a tree](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/woodpecker-in-the-snow.jpg?itok=WmWgTEIl)
Do Woodpeckers Get Concussions?
STEM Explained
Pecking puts a lot of force on a woodpecker’s brain. But scientists think woodpecker bodies are adapted to help keep them from being injured during pecking-related collisions.
![Energy-saving light bulbs are a great way to save money at home](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/one-hanging-energy-saving-light-bulb.jpg?itok=IocGQakA)
Energy Efficiency at Home
STEM Explained
If you understand heat transfer, you can make lots of little changes at home to help the environment and your household’s bank account!
![Wind turbines with energy storage system](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/wind_turbines_with_energy_storage.jpg?itok=LY0Hfznj)
Can You Store Electricity for Later?
STEM Explained
Sometimes, power plants make too much electricity. Energy storage technologies can help! They store the extra electricity and release it when demand goes up.
![Forest Service Engineer Forest Service Engineer](/sites/default/files/styles/resource_card_image_360x300_/public/Boise_National_Forest_Engineer.jpg?itok=3Xeix4UP)
Careers: Engineer
Picture Collections
5 images of some different engineers and their work places such as engineers at a hydroelectric plant, in a forest and at NASA
![Working on Planning Drawings Working on Planning Drawings](/sites/default/files/styles/resource_card_image_360x300_/public/wopd.jpg?itok=2JP4eJbF)
Careers: Architect
Picture Collections
5 images of some work that architects do such as designing buildings and making blueprints
![Teenage boys arm wrestling at school](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/teenage-boys-arm-wrestling.jpg?itok=FeHUO_WV)
Arm Wrestling and Torque
STEM Explained
Arm wrestling isn’t just a test of strength. It’s also a test of how well you understand torque.
![Billiard balls and a cue stick on a felt-covered table (PIRO4D, Pixabay)](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/Billiard_balls_and_stick.jpg?itok=eHUZkzLE)
Billiards and Collisions
STEM Explained
The game of billiards shows the principles of collisions, momentum & impulse, and kinetics at work!
![Damage to DNA](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Damage_to_DNA.jpg?itok=qSvdjV4V)
Radiation Effects on Cells & DNA
Backgrounders
This backgrounder explains the effects of radiation on cells and DNA.