JPEG (JPG)

Lesson plan: distinguish .jpg from .jpeg naming, identify raster pixels, choose JPEG for photographs, and recognize that ordinary JPEG has no transparency.

A beginner sequence could have three short activities: identify what JPEG is and is not, compare a photograph with a transparent logo, and calculate pixels versus print size. Completion should require a knowledge check, not merely page scrolling.

The learner should leave the beginner level able to reject three wrong assumptions: that JPG and JPEG are separate formats, that a larger DPI label creates missing detail, and that a white-looking JPEG background is transparent. Show a photographic example and a logo example side by side so the choice feels grounded in real Goodiee work. A short check can ask which file should become a listing photo and which needs an alternate production format.

Lesson plan: calculate effective output resolution, crop for a product template, compare quality exports, and check orientation and color profile.

An intermediate sequence should let a learner crop one source for two products, compare compression candidates at 100% and final size, and inspect orientation and profile. The expected output is two labeled derivatives with reasons for each decision.

The intermediate lesson should provide a source photo and two product templates with different aspect ratios. Let the learner crop each separately and see both the preview and the remaining pixel dimensions. Then let them compare two exports from the same source. Feedback should explain why a crop, quality choice, or profile handoff succeeds or fails under the given brief.

Lesson plan: evaluate metadata and color-management handoff, run a controlled proof, and diagnose compression versus process defects.

An advanced sequence should simulate a maker handoff with incomplete requirements. The learner must identify missing product or process information, select appropriate validation steps, interpret proof results, and document a repeatable decision.

The advanced lesson can start with a maker reporting that the printed product looks soft and slightly warm. The learner should inspect the source and export, calculate effective resolution, check profile interpretation, and compare a known-good proof before changing settings. The exercise should reward a controlled diagnosis and an honest hold decision when evidence is missing, not a guessed universal preset.