The activities lend to elaboration for students use the gas law equations (Charles Law, Boyle’s Law, and Combined Gas Laws) to complete computational problems that reinforce their experiences investigating the relationship among pressure, volume, and temperature in different situations. In many ways, the activities meet the learning goals (students were beginning to master the performance expectation outlined by the NGSS), and students made connections among the various activities to develop content understanding and critical reasoning skills to constructed explanations from evidence