Not only do bulletproof vests need to not break from a bullet impact, 
but it also needs to absorb the energy from the bullet as well. This can be done by using strong and tough materials. Strong materials take a lot of energy to change shape, while tough materials take a lot of energy to break. Together, a material can be made that can stop a bullet by both absorbing the energy from the bullet and not breaking under the impact.
The student handout will be given to all students working on the design challenge. It gives a brief recap of the story, it helps the students identify what they are attempting to achieve, and it recaps the design process.
Bulletproof Vest TEK8 Instructor’s Guide
This Instructor’s Guide provides the instructor additional information on how to run the design challenge with alternatives for materials and test setups as well as information to help make the design challenge a good educational experience.
The Telling the Story Video conveys the societal impact of the student’s research that is the basis for the design challenge and will set the problem-solving context for students.
The Design Challenge Video leads students through the design process. It indicates materials available, states what the criteria are for success and any constraints. It also gives a second ‘level’ of the design challenge that allows ‘early completers’ to move on to a slightly more difficult challenge.
The presentation can be used in conjunction or in place of the Design Challenge Video.