Average number of hours and percentage of the student school week that public school teachers of first- through fourth-grade, self-contained classrooms spent on each of four subjects, total instruction hours per week on four subjects, total time spent delivering all instruction per week, and average length of student school week: Selected years 1987-88 through 2007-08

Schools and Staffing Survey (SASS)

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Average number of hours and percentage of the student school week that public school teachers of first- through fourth-grade, self-contained classrooms spent on each of four subjects, total instruction hours per week on four subjects, total time spent delivering all instruction per week, and average length of student school week: Selected years 1987-88 through 2007-08

	1987-88		1990-91		1993-94		1999-2000		2003-04		2007-08
Characteristic	Average number of hours	Percen- tage of student school week	Average number of hours	Percen- tage of student school week	Average number of hours	Percen- tage of student school week	Average number of hours	Percen- tage of student school week	Average number of hours	Percen- tage of student school week	Average number of hours	Percen- tage of student school week
English	11.0	35.0	10.5	32.9	10.9	34.0	10.9	33.6	11.6	35.5	11.7	35.6
Mathematics	4.9	15.4	4.9	15.3	5.3	16.4	5.7	17.4	5.4	16.5	5.6	16.9
Social studies	2.8	8.7	2.9	9.1	3.0	9.5	2.9	8.9	2.5	7.6	2.3	7.1
Science	2.6	8.1	2.7	8.4	3.0	9.2	2.6	8.1	2.3	7.1	2.3	7.1
									0.0
Total of four subjects	21.2	67.1	21.0	65.8	22.1	69.2	22.1	68.0	21.8	66.7	21.9	66.8
Total time spent delivering instruction	27.9	88.4	—	—	—	—	—	—	29.6	90.6	31.2	94.7
Length of student school week	31.6	†	31.9	†	32.1	†	32.6	†	32.6	†	33.0	†
— Not available; data were not collected.
† Not applicable; student school week variable is used as the denominator.
NOTE: Due to school-level nonresponse, estimates in the row reporting "Length of student school week" are not available for all teachers in the sample. The reported estimates are for those teachers from responding SASS schools. Estimates in the "Percentage of student school week" columns are similarly affected. Detail may not sum to totals because of rounding.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Schools and Staffing Survey (SASS), "Public Teacher Data File," 1987-88, 1990-91, 1993-94, 1999-2000, 2003-04, and 2007-08; "Public School Data File," 1987-88, 1990-91, 1993-94, 1999-2000, 2003-04, and 2007-08; "Charter Teacher Data File," 1999-2000; and "Charter School Data File," 1999-2000.

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