In this web-based activity, students take on the challenge of building roller coasters, using the principals of the Law of Conservation of Energy, Energy Transfer, Mechanical Energy, Kinetic Energy and Potential Energy. They use a program called "Coaster Creator". This lab report guide helps them through and encourages them to deeply analyze what they are doing and how it connects the main concepts in an energy unit. The lab report will help students take the activity seriously as they have to play the roles of mechanical engineers and apply the concepts of energy to be successful. The activity is exciting, challenging, and rigorous! it is sure to keep your students engaged and applying their understandings at a higher level! The content standards-aligned to 7th-grade essential standards (Energy Unit).