TIMSS - Science for Grades 4 and 8: Trends Over 5-6 Time Points

Science for Grades 4 and 8: Trends Over 5-6 Time Points

Table 37. Trends in percentage of U.S. 4th-grade students reaching the TIMSS international benchmarks in science: 1995, 2003, 2007, 2011, and 2015
	1995		2003		2007		2011		2015
	Percentage	s.e.	Percentage	s.e.	Percentage	s.e.	Percentage	s.e.	Percentage	s.e.
Percentage is larger than the 2015 percentage at the .05 level of statistical significance. Percentage is smaller than the 2015 percentage at the .05 level of statistical significance. NOTE: U.S. trend tables show data for all available years. Standard error is abbreviated as s.e. The United States met guidelines for sample participation only after replacement schools were included in 2003, 2007, and 2015. The United States' National Defined Population covered 90 to 95 percent of the National Target Population in 2007, 2011, and 2015. SOURCE: International Association for the Evaluation of Educational Achievement (IEA), Trends in International Mathematics and Science Study (TIMSS), 1995, 2003, 2007, 2011, and 2015.
Advanced (625)	19	1.3	13	0.8	15	0.9	15	0.8	16	0.8
High (550)	50	1.6	45	1.4	47	1.3	49	1.1	51	1.1
Intermediate (475)	78	1.1	78	0.9	78	1.1	81	0.8	81	0.9
Low (400)	92	0.7	94	0.5	94	0.6	96	0.4	95	0.5