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Main Curriculum Tie:
Background For Teachers:
Indicators of a chemical change can be color, a new odor, light or change in heat is given off. When making Blobber two liquids are mixed together forming a precipitate. A precipitate is also an indication that a chemical change has taken place.
Super Science Concoctions, by Jill Frankel Hauser talks about a mistake that paid off, “Try as he might, the chemist James Wright was never able to create rubber in the laboratory. But one of the mistakes did become a very popular toy. When he added boric acid to silicone oil he created a bouncing solid that oozed like a liquid. You probably know it as Silly Putty!” (pg. 152).
Intended Learning Outcomes:
What happens when you mix glue, and a mixture of borax and water together? Can you bend it, bounce it, even blow it up like a balloon. Why is it so moldable and flexible?
Corcoran, Carol A.; (May-Jun 2004). A teacher’s guide to alternative assessment: Taking the first steps. Clearing house, Volume 77.5, p.213.
Hands-on learning is critical to students’ understanding of science concepts. Research shows that hands-on projects actually help children learn better. Hands-on learning helps students more readily understand concepts and boosts their self-confidence.
Performance Assessment is the collection and evaluation of evidence of student learning, focusing on indicators of meaningful and valuable student progress. This type of assessment asks students to perform, create, produce or do something. It tapes into higher-level thinking and problem-solving skills. It uses tasks that represent meaningful instructional activities involving real world applications and using human judgment to do the scoring.
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