Paper session 2 · Evaluate conditions

Target / planning estimate

Evaluate conditions; 35–45 min.

Print / prior evidence

Was It a Fair Comparison? Teach-the-Lesson, student pp. 1–4; Read before evaluating a comparison, questions 1–2, Two things changed, questions 1–3, Guided practice · Repair setup cards, questions 1–3, Independent task · Fresh critique, questions 1–3.

Evidence of headings and change from session 1; use Was It a Fair Comparison? prerequisite bridge if entering directly.

Teacher demonstration

Identify the intended comparison and relevant conditions for mass, start, time, cup, room and readout in the Model.

Learner work / collect

Critique the guided-practice record, repair the plan, then independent task. Collect named confounds and a matched recording plan.

Next decision / continuation

Subtraction does not fix a confound, questions 1–2 for confounds; Specify a usable plan, questions 1–3 for recording details before trial comparison.