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Stephens, Maria; Landeros, Katherine; Perkins, Robert; Tang, Judy H. – National Center for Education Statistics, 2016
The Trends in International Mathematics and Science Study (TIMSS) 2015 is the sixth administration of this international comparative study since 1995 when first administered. TIMSS is used to compare over time the mathematics and science knowledge and skills of fourth- and eighth-graders. TIMSS is designed to align broadly with mathematics and…
Descriptors: Achievement Tests, International Assessment, Foreign Countries, Elementary Secondary Education
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Kawasaki, Keiko; Herrenkohl, Leslie Rupert; Yeary, Sherry A. – International Journal of Science Education, 2004
The purpose of this paper is to carefully examine the evolution of students' theory building and modeling, critical components of scientific epistemologies, over a unit of study on sinking and floating in one third/fourth grade classroom. The study described in this paper follows in the tradition of Design Experiments (Brown 1992, Collins 1990)…
Descriptors: Elementary Education, Science Instruction, Elementary School Science, Scientific Principles