Average percentage distribution of eighth-grade science lesson time devoted to different types of lesson purposes, by country: 1999

Table 2. Average percentage distribution of eighth-grade science lesson time devoted to different types of lesson purposes, by country: 1999
Purpose	Australia (AUS)	Czech Republic (CZE)	Japan (JPN)	Netherlands (NLD)	United States (USA)
Developing new content¹	85	67	93	78	79
Reviewing previous content²	8	19	3	1!	8
Going over homework³	#	1!	‡	12	3
Assessing student learning⁴	‡	9	1	2	3
Other purposes⁵	7	4	3	7	8
#Rounds to zero.
! Interpret data with caution. Estimate is unstable.
‡ Reporting standards not met. Too few cases to be reported.
¹ Developing new content: AUS, JPN, USA> CZE; JPN> NLD, USA.
² Reviewing previous content: CZE> AUS, JPN, NLD, USA; USA> JPN, NLD.
³ Going over homework: NLD> AUS, CZE, USA.
⁴ Assessing student learning: CZE> JPN, NLD, USA; NLD> JPN.
⁵ Other purposes: AUS, NLD, USA> CZE, JPN.
NOTE: Detail may not sum to 100 because of rounding and missing data. The tests for significance take into account the standard error for the reported differences. Thus, a difference between averages of two countries may be significant while the same difference between two other countries may not be significant.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Third International Mathematics and Science Study (TIMSS), Video Study, 1999.