Pedagogical Content Knowledge in Science
Pedagogical Content Knowledge in Science tests how you elicit, interpret, and improve students’ scientific thinking.
Core content
- Misconceptions: Children’s ideas are often coherent and resistant. Tell-and-correct rarely works; use discrepant events, evidence gathering, and discussion to create cognitive conflict.
- Inquiry and 5E: Inquiry involves questions, evidence, explanation, evaluation, and communication. The 5E model-Engage, Explore, Explain, Elaborate, Evaluate-sequences instruction so exploration precedes formal explanation.
- Assessment: Formative assessment informs instruction; summative assessment judges learning. Distractor analysis reveals reasoning, not just right or wrong answers.
- Discourse and models: Open questions and wait time support reasoning. Models are useful but limited; students should identify what a model does and does not represent.
- Safety: Require goggles when risk exists, never allow tasting chemicals, supervise flames and live organisms, and plan for allergies and disposal.
Worked example
A student claims, “Plants get their food from soil.” The strongest response is not to repeat “plants make food by photosynthesis.” Have students grow plants in a medium without soil, measure mass changes, and compare with a no-light control. Evidence challenges the idea that soil is the food source; the teacher then names photosynthesis and helps students revise their explanation.
Traps
- Believing hands-on activity automatically produces understanding; it must be minds-on.
- Responding to a misconception only by stating the correct fact.
- Treating the “scientific method” as one fixed sequence.
- Using assessment only for grades rather than to adapt instruction.