Science and Engineering Practices
The practices are the verbs of science: what a scientist actually does. For Grade 5, the tested practices include asking questions and defining problems, planning and carrying out investigations, using models, analyzing data, constructing explanations, and arguing from evidence. The single biggest idea to teach is that a claim must be supported by evidence from the investigation, not by opinion, authority, or what "seems right."
Concepts to master
- Variables: an investigation should change one thing (the independent variable), keep everything else the same (controlled variables), and measure a result (the dependent variable).
- Fair tests: comparing two setups that differ in only one way.
- Models: a model is a simplified stand-in (a diagram, a stream table, a globe) that explains or predicts; models have limits.
- Data: repeated trials reduce error; patterns in tables and graphs are evidence.
Traps to watch for
Questions love to offer a setup with two or three differences and ask "is this a fair test?" The answer is usually no. Another trap: a student "conclusion" that states a preference ("plants like music best") rather than a measurable result. Also watch for choosing a model as "proof" - models predict and explain, they do not prove.
Rule of thumb
One change, measure one result, repeat, compare. If a question shows a plan that changes two things at once, the correct response is almost always to point out the unfair comparison.
Worked example
Two students test whether sunlight affects bean growth. Pot A sits on a sunny windowsill and gets water daily; Pot B sits in a dark closet and gets water every other day. Pot B grows taller. Can they conclude sunlight stunts growth? No - water amount also differed. The fair-test fix is to give both pots the same watering schedule and change only light.