Keep each formula with its variable definitions, units, sign convention, assumptions, and valid operating range.
Check diagrams for scale, direction, boundaries, labels, reference points, and coordinate systems.
Separate measured data from model results. Record tolerances, uncertainty, conditions, and the source of each value.
Use this review prompt: Which assumptions permit this method, and when does the method fail?
Use this review prompt: Which units and sign convention make this calculation consistent?
Solve complete problems separately. Short cards do not test full calculations, design trade-offs, laboratories, or safety decisions.