9. Motivation Students who can write this equation for combustion: CH 4 + 2O 2 CO 2 + 2H 2 O often cannot answer: "When a house burns to the ground and only a few pieces of charred wood and ashes are left, what happens to the rest of the mass of the house?” (AAAS Project 2061 conference 2001)
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11. Motivation Based on Benchmarks , AAAS developed a progression of concepts for several aspects of the ‘Structure of Matter’ Rather linear and ordered progression Forces & Interactions Properties of Matter Conservation of Matter States of Matter Atoms & Molecules Chemical Reactions
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14. The “Stuff” of Progressions 5 Generation : Research 4 Construction : Examining assumptions, relating models 3 Formulation : Relating ideas and concepts, simple models 2 Recognition : Language, definitions, symbols algorithms 1 Notions : Everyday experience, logical reasoning novice expert student understanding Progress variables linked to curriculum
15. The “Stuff” of Progressions I. Notions II. Recognition III. Formulation Student levels of understanding Stuff happens Solid, liquid, gas Chemical equations, conservation of mass (atoms/stuff/grams) Atomic symbols, octet rule Change Matter number mole mass macro particulate conservation
16. The “Stuff” of Progressions An intricate web of interconnected concepts Multidimensional States of Matter Forces & Interactions Properties of Matter Chemical Reactions Conservation of Matter Atoms & Molecules
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