Week+2

Week 2:

__Brief overview of previous lesson:__ - discuss what happened last week, what was interesting, surprising, new.

"raisins went up and down" "air bubbles rise and then popped" "Chemical reaction" "physical can change back to original state"

__Experiment 1: Vinegar and Washing powder.__

Conduct a Predict, Observe, Explain in their books.

__Experiment 2: Making crystals.__

Predict, Observe, Explain.

Students responses:

Dissolving means: //"wash away"// //"dissolve into water"// //"disappear"// //"blending into water"//

Water particles: //"salt goes middle of gaps of water"// //"concentration of salt to water"// //"dissolves the salt,if not enough water salt wont dissolve.// //"When somethings warmed up it expands"//

This was a really effective lesson. The explicit teaching set us up for the following classes. The kids really enjoyed the process of conducting an experiment and discussion illustrated that they understood that variables affected the results. Comments such as "What will happen if we add more salt?" and "Will the cups with more water grow more crystals?" illustrated this. The explanation about 'dissolving' chemicals into other chemicals using the children as particles was really successful as children acted out what was happening.