Read e-book online A Splintered Vision: An Investigation of U.S. Science and PDF

By W.H. Schmidt (Editor), Curtis C. McKnight (Editor), S. Raizen (Editor)

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Why were there so few topics in common (to 70 percent or more of the states)? If specific topics are to some extent incidental, states may choose topics based on their own preferences and the topics’ perceived relevance to local situations. ) are from physical science. This is a discipline with more restricted content and organized incrementally more like mathematics. 37 UNFOCUSED CURRICULA Exhibit 13. S. and international topics for Population 1 science. S. composite science curriculum in state curriculum guides includes fewer topics at this grade level than the international composite.

S. S. S. grade 8). Bold-face labels are more general categories that subsume more specific (non-bold-face) topics. S. and international) are arranged in three categories. These three are topics listed only in 70 percent of curriculum guides, topics listed in 70 percent of both curriculum guides and textbooks, and topics listed only in 70 percent of the textbooks. ] International Number Integer, Rational & Real Numbers Real Numbers. -Algebra Textbooks Number Estimation & Number Sense Concepts Estimating Quantity & Sire Rounding & Significant Figures Estimating Computations Exponents & Orders of Magnitude Measurement Units Estimation & Errors Geometry: Position, Visualization & Shape 3-D Geometry Vectors Geometry: Symmetry, Congruence & Similarity Congruence & Similarity Constructions Using Straightedge & Compass Proportionality Proportionality Concepts Number Integer, Rational & Real Numbers Integers & Their Properties Rational Numbers & Their Properties Number Whole Numbers Operations Fractions & Decimals Common Fractions Relationship of Common & Decimal Fractions Percentages Integer, Rational & Real Numbers Integers & Their Properties Number Whole Numbers Operations Fractions & Decimals Common Fractions Relationship of Common & Decimal Fractions Percentages Integer, Rational & Real Numbers Integers & Their Properties Estimation & Number Sense Concepts Estimating Quantity & Size Rounding & Significant Figures Estimating Computations Other Numbers & Number Concepts Exponenu.

The pattern of covering more topics is present but not as pronounced as in the composite curricula portrayed in Exhibit 1 and Exhibit 2, at least at these selected grades and UNFOCUSED CURRICULA 27 Exhibit 8. Average intended duration for physical science topics. S. composite curriculum is above the international median and higher than all but seven other TIMSS countries for topics in these categories. Japan is also above the median. Germany is at the median. [These data are the intended duration of science topics in physics, averaged over all topics in these categories for each country.

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