Performance expectationUse mathematical representations to support the claim that the total momentum of a system of objects is conserved when there is no net force on the system.
Emphasis is on the quantitative conservation of momentum in interactions and the qualitative meaning of this principle.
Assessment is limited to systems of two macroscopic bodies moving in one dimension.
Every item written to HS-PS2-2 has to assess all three dimensions together, not the content alone. This is the structural change that made older practice material stop matching the exam.
Using Mathematics and Computational Thinking
Phenomenon stimulus, connected items across the required types, answer key, rubric and figures drawn deterministically from a structured spec — in the format your students will sit.