2026-04-27 20:49:10lisa:
C02 home: add new pages (Essential Terms, Data Collection Methods, Context Diagram)
Restructure into Start here / Data collection (C2-1) / Analytical
diagrams (C2-2) groupings so students can find pages by validation.
sd/C02/C02-home.md ..
@@ 6,13 6,20 @@
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## Key concepts
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## Start here
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Short explainers for the concepts most commonly confused or under-done at each rubric band:
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- [Essential Terms](/sd/C02/Essential%20Terms) — glossary of every C02 term (data collection, the three diagrams, qual/quant); click each term to expand its definition
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## Topics — Data collection (C2-1)
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- [Data Collection Methods](/sd/C02/Data%20Collection%20Methods) — the four methods (interview, survey, observation, report) — when to use each, strengths/weaknesses, recommended 3-method mix
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- [Explaining vs Describing Your Data Collection](/sd/C02/Explaining%20vs%20Describing%20Your%20Data%20Collection) — the exact rubric difference between 7–8 and 9–10 for Indicator 1; worked examples of each level
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## Topics — Analytical diagrams (C2-2)
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- [Context Diagram](/sd/C02/Context%20Diagram) — Yourdon-DeMarco notation, a worked example, "draw it / check it" steps, common mistakes
- [Context Diagram vs Data Flow Diagram](/sd/C02/Context%20Diagram%20vs%20Data%20Flow%20Diagram) — what can appear on each diagram, side-by-side; the most common notation errors in C2-2
- [What Is an Entity?](/sd/C02/What%20Is%20an%20Entity) — why entities include external systems (APIs, email servers) as well as human users; how to find every entity from your user stories
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- [Explaining vs Describing Your Data Collection](/sd/C02/Explaining%20vs%20Describing%20Your%20Data%20Collection) — the exact rubric difference between 7–8 and 9–10 for Indicator 1; worked examples of each level
- [Excalidraw Diagram Starters](/sd/C02/Excalidraw%20Diagram%20Starters) — pre-framed skeletons for all three C02 diagrams (context diagram, DFD, use case diagram) with shape keys and notation checks (DRAFT)
