WELCOME to WINDOWS on the INQUIRY CLASSROOM!
You have landed on a piece of a National Science Foundation Project (DUE 1245730) directed by Professor Chris Bauer, Chemistry Department, University of New Hampshire. This is one part of a completely documented inquiry-based university science course called “Fire & Ice” which explores the nature of heat and temperature. There are multiple video perspectives and commentary from instructors and students, and documents of all course materials (agenda, instructions, student work). It’s too complicated to explain here. Take a look at the user orientation document at this link.
Bauer, Christopher F., "7.5.3 Phase change and latent heat: Graphing Classroom View" (2016). Day 07 Feb 12 Heating and cooling curves. 28.