STEM Challenge - Project Quality Construction - Build a Cantilever Crane

Looking for a flexible, multi-day activity that gets your students “doing science?” Every STEM Challenge offers a hands-on, inquiry-based, student-led project designed to allow them to step into the roles of researchers and engineers.

STEM Challenge projects are ideal for use at any time throughout the school year, between units, before breaks, or during afternoons when testing weeks occur.

For teachers, there are presentations and step-by-step guides to facilitate pacing and lesson plans that align with standards. Students utilize the included notebooks to guide them through activities (both individually and in small groups), challenge them to learn new information, and reflect on and apply the information they have learned. 

The Challenge:

Although you might not have heard of a cantilever, you have certainly seen them before. The cantilever is considered one of the great structural forms in building. As a freshman college student in engineering design, you have been challenged by your professor to research and build a cantilever system. You will be given access to a budget and a limited number of materials. Your professor (also known as your teacher), will give you the exact mass that the cantilever is required to hold during your test. One other building requirement is that your device must be a minimum length of 25cm as measured from the edge of the testing surface.

This testing challenge determines if you will continue on to the next class towards your engineering degree. Good luck to you and your team!

What’s in a STEM Challenge?

• a video explaining the engineering challenge and setting the context for the project
• a BIG Question to guide the inquiry
• teacher presentation in PPT (Google-compatible) and Keynote
• a teacher's guide on what the teacher and students should be doing along the way
• student notebook offers
  • questions to provide the students with a framework for their inquiry throughout the entire project
  • opportunities to absorb new information and reflect on ways to use it to complete the challenge

• Using the LAUNCH process, students brainstorm with their peers and reflect on failures and opportunities, with the prospect of sharing their ideas with the world. This holds students accountable, and they will put forth the best effort, knowing that other students could critique the project.
• Each STEM Challenge contains a list of suggested supplies for its project. We were very cautious about choosing inexpensive items, and the supply list is dynamic, allowing for adjustments to individual situations. Suggested supplies include: 
  • Cardboard or poster board
  • Glue
  • Toilet paper/paper towel tubes
  • Pipe cleaners
  • Scissors
  • Paper
  • Craft sticks
  • String or twine
  • Tape
  • Paperclips
  • Rubber bands
  • Bendable straws
  • Straight straws
  • Wooden blocks
  • Toothpicks
    

Supports Next Generation Science Standards:

MS-PS3-2

Develop a model to describe that when the arrangement of objects interacting at a distance changes, different amounts of potential energy are stored in the system.

MS-ETS1-1

Define the criteria and constraints of a design problem with sufficient precision to ensure a successful solution, taking into account relevant scientific principles and potential impacts on people and the natural environment that may limit possible solutions.

MS-ETS1-2

Evaluate competing design solutions using a systematic process to determine how well they meet the criteria and constraints of the problem.

MS-ETS1-3

Analyze data from tests to determine similarities and differences among several design solutions to identify the best characteristics of each that can be combined into a new solution to better meet the criteria for success.

MS-ETS1-4

Develop a model to generate data for iterative testing and modification of a proposed object, tool, or process such that an optimal design can be achieved.