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This is the compact poster layer for fast recall.
Each image keeps only the visual logic, while the detailed explanation stays in the note next to it.
Python, Week 8, file I/O and CSV flow

- Use when the question is about reading, converting, and writing structured data.
- Main traps: header mismatch, delimiter mismatch, and type conversion.
Maths I, Week 6, signed area and FTC

- Use when the question asks for an antiderivative or a definite integral.
- Main trap: forgetting that area below the x-axis is negative.
English II, SOP and precis writing

- Use when the task is short-form writing under a constraint.
- Main trap: precis must preserve meaning, SOP must stay specific.
Python, Week 10, class vs instance state

- Use when the question asks what belongs to the class and what belongs to the object.
- Main trap: mutating shared state accidentally.
Python, Week 6, container choice
- Use when the question is really asking for the right data shape.
- Main trap: choosing by habit instead of by structure.
Maths I, Week 8, matrix dimension logic
- Use when matrix multiplication feels slippery or the shapes stop lining up.
- Main trap: forgetting the inner dimensions must match.
English II, Week 1, rhetoric map
- Use when the figure of speech is a naming or meaning trap.
- Main trap: metonymy vs synecdoche, and oxymoron vs paradox.
Practice Dock, hint ladder
- Use when a question needs a gradual reveal instead of a full solution dump.
- Main trap: asking for too much too soon and making the ladder noisy.