Every graduate profile promises critical thinking; few courses teach it on purpose. Four short lessons on doing exactly that, then a self-check.
‘Critical thinking’ means little until you make it concrete: what does good reasoning look like in your field?
Experts hide their reasoning. Students learn to think by seeing thinking — so think out loud and show the messy middle.
Recall questions can't assess thinking. Design tasks that require analysis, evaluation and judgement (Bloom's higher levels).
What you assess is what students practise. Reward the quality of reasoning, not just the conclusion.