Video Guide for Mark Rober Video: How to save 51 Billion Lives for 68 cents with simple Engineering. https://youtu.be/Qf-D1Upn-KU?si=PNMgfQWRIQC2L_X3 Student engineering challenge: This will walk through the Engineering Design Process with students and learn to think like an engineer. Generally, this challenge will take 3-4 class periods with student presentations.