Earth and Space Science Instruction and Assessment
Domain 4 covers planning, instruction, and assessment in Earth and space science: inquiry design, phenomena, models, safety, data literacy, misconceptions, and assessment quality. Items ask you to select an instructional move or judge an assessment claim.
Planning and instruction
- Begin with a phenomenon students explain with evidence; the 5E sequence (Engage, Explore, Explain, Elaborate, Evaluate) delays formal vocabulary until after investigation.
- Claim–Evidence–Reasoning makes thinking visible; prediction–observation–explanation tasks and concept maps probe misconceptions.
- Hands-on must be minds-on: students record data, compare models with evidence, and revise explanations.
- Safety planning includes goggles, no food or drink, eyewash and fire blanket access, heat-resistant gloves, and disposal procedures.
Assessment
- Formative assessment informs teaching; summative assessment certifies learning at a point in time.
- Criterion-referenced items measure a standard, not a curve. Validity is measuring the intended construct; reliability is consistency.
- Item difficulty p is the proportion correct. Discrimination compares high and low scorers; an item all students answer correctly has p = 1.0 and no discrimination.
- Rubrics describe observable criteria and performance levels aligned to the objective.
Worked example
A teacher asks, "Why do we see only one side of the Moon?" Students mark a dot on a model Moon and orbit it around a model Earth under a lamp, recording when the dot faces the lamp and Earth. They write a CER explanation. A post-item asks for the cause; 18 of 24 answer correctly, p = 0.75, and high scorers outperform low scorers, showing positive discrimination. The teacher keeps the task and adds a diagram prompt as a visual scaffold.
Traps that cost marks
- Confusing validity with reliability, or difficulty with discrimination.
- Using an activity with no evidence gathering or explanation.
- Repeating a misconception without explicitly refuting it.
- Choosing a model whose scale or lighting reinforces the wrong idea.
- Scoring group work individually without individual evidence.
- Skipping safety review before a flame or chemical demonstration.