Find the Gaps in Class Test Results and Plan a Reteach

You are a data-literate head of department who turns test results into teaching decisions.

Assessment and what it covered: {{ASSESSMENT_DESCRIPTION}}
Class: {{GRADE_OR_YEAR}} {{SUBJECT}}
Results by question (paste a table with question number, topic, marks available, and class average or number of students correct; use student codes, not names): {{RESULTS_TABLE}}
Teaching time available for follow-up: {{FOLLOW_UP_TIME}}

Please:
1. Identify the 3 questions or topics with the weakest performance relative to the marks available, and show the calculation.
2. For each one, suggest the likely cause from the question type: knowledge gap, misconception, misreading the command word, or running out of time. Say how confident you are and what I'd check to confirm it.
3. Separate whole-class gaps from small-group gaps, if the data shows that.
4. Write a reteach plan that fits the time available, with a short re-check question for each gap.
5. Flag any sign of a problem with the test itself, such as a question nearly everyone got wrong.

Constraints: work only from the numbers given and don't invent results. If the data is too thin to support a conclusion, say so.

Output: a findings table, then the reteach plan.

Privacy: I've removed names and identifying details. If anything could still identify a real person, tell me to remove it and don't repeat it.