📊 Week 2 Kickoff Slides

The slide deck used in the Week 2 in-class kickoff session. The deck covers: welcome back + recap, the live quiz, chapter-by-chapter tour (Ch1-8), two live exercises from the practice chapter, the agenda card, the assignment scaffold tour, and the closing hand-written reflection.

<aside> 💡 Use this as a recap. If you missed class or want to re-walk the agenda, the deck mirrors the structure of the lesson: same section numbers, same order. Especially useful for the assignment-launch walk-through (§8) when you start the assignment at home.

</aside>

Download

week_2__presentation.pdf

What's in it

Slides 1-6 : Welcome back, the "From Script to System" theme, today's agenda (split first half / second half).
§1 Live Quiz Round 1 : 10 recognition-level questions covering Ch1-Ch4 (Intro Pipelines, Config & Secrets, Separation of Concerns, OOP vs Functional).
§2 Chapter Tour: Ch1-4 : one slide per chapter, Ch1 (ETL intro + Disaster Script code), Ch2 (config & secrets), Ch3 (separation of concerns), Ch4 (OOP vs functional decision framework).
§3 Live Exercise A : exercise options table + starter code for the recommended exercise (Ex 3: Separate I/O from Logic).
§4 Agenda Card : flag what felt shaky on the read via the Live Q&A site. Drives the §8 Deep-Dive after the break.
☕ Break.
§5 Live Quiz Round 2 : 10 application-level questions covering Ch5-Ch8 + the Week 2 gotchas.
§6 Chapter Tour: Ch5-8 : one slide per chapter, Ch5 (dataclasses + __post_init__), Ch6 (functional composition + spread pattern), Ch7 (pytest fixtures + parametrize), Ch8 (Ruff format + check).
§7 Live Exercise B : exercise options table + step-by-step pytest build-up for the recommended exercise (Ex 4: Write Tests with Pytest).
§8 Concept Deep-Dive : responsive to the agenda card; default fallbacks are mutation traps (Gotcha #1) + mutable-default-in-dataclasses (Gotcha #2).
§9 Assignment Launch : the MessyCorp pipeline mission, the live template-clone walkthrough, the auto-grader baseline.
§10 Career Relevance + Q&A : mapping a real 2026 Data Engineer job description to this week's skills; Week 3 preview.
§11 🖊️ Hand-written Closer : 10-min on-paper code-review response to a teammate proposing to bundle four stateless transforms into a Pipeline class.

The slides are deliberately student-facing only. The teacher's per-section script (pacing, quiz answer cribs, exercise reference solutions, deep-dive default topics, closer rubric) lives in the GitHub-only week_2__lesson_plan.md (visible on GitHub only; not synced to Notion, so no link from this page).

Practice exercises (referenced in the live exercise slides)

The two live exercises the deck showcases come from the Learning-Resources repo. One Codespace covers both:

Section	Exercise	Codespace folder
§3 Live Exercise A (recommended)	Ex 3: Separate I/O from Logic	`data-track/week-2/exercise_3/`
§3 Live Exercise A (alternative)	Ex 1: Move Secrets to .env	`data-track/week-2/exercise_1/`
§7 Live Exercise B (recommended)	Ex 4: Write Tests with Pytest	`data-track/week-2/exercise_4/`
§7 Live Exercise B (alternative)	Ex 2: Model Data with a Dataclass	`data-track/week-2/exercise_2/`

The teacher chooses which to run live based on quiz wrong-pick patterns. Solutions live in each exercise_N/solutions/ folder.

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