IDA blend - Pupil-teacher ratio, secondary

Pupil-teacher ratio, secondary in IDA blend was 18.86 as of 2018. Its highest value over the past 48 years was 22.88 in 2004, while its lowest value was 17.19 in 1970.

Definition: Secondary school pupil-teacher ratio is the average number of pupils per teacher in secondary school.

Source: UNESCO Institute for Statistics (http://uis.unesco.org/)

See also:

Year Value
1970 17.19
1971 17.24
1972 17.35
1973 17.65
1974 17.91
1975 18.17
1976 18.16
1977 18.38
1978 18.19
1979 18.48
1980 19.26
1981 20.00
1982 19.38
1983 19.98
1984 19.98
1985 20.88
1986 19.68
1987 19.01
1988 18.19
1989 17.68
1990 17.54
1991 17.64
1992 17.60
1993 17.45
1994 17.37
1995 18.07
1996 18.67
1997 19.18
1998 19.58
1999 19.90
2000 20.36
2001 20.88
2002 21.21
2003 21.39
2004 22.88
2005 22.33
2006 21.54
2007 21.37
2008 20.62
2009 20.66
2010 21.17
2011 18.80
2012 21.15
2013 19.42
2014 18.33
2015 18.24
2016 19.05
2017 18.49
2018 18.86

Development Relevance: The pupil-teacher ratio is often used to compare the quality of schooling across countries, but it is often weakly related to student learning and quality of education.

Limitations and Exceptions: The comparability of pupil-teacher ratios across countries is affected by the definition of teachers and by differences in class size by grade and in the number of hours taught, as well as the different practices countries employ such as part-time teachers, school shifts, and multi-grade classes. Moreover, the underlying enrollment levels are subject to a variety of reporting errors.

Other Notes: Data retrieved via API in March 2019. For detailed information on the observation level (e.g. National Estimation, UIS Estimation, or Category not applicable), please visit UIS.Stat (http://data.uis.unesco.org/).

Statistical Concept and Methodology: Pupil-teacher ratio is calculated by dividing the number of students at the specified level of education by the number of teachers at the same level of education. Data on education are collected by the UNESCO Institute for Statistics from official responses to its annual education survey. All the data are mapped to the International Standard Classification of Education (ISCED) to ensure the comparability of education programs at the international level. The current version was formally adopted by UNESCO Member States in 2011. The reference years reflect the school year for which the data are presented. In some countries the school year spans two calendar years (for example, from September 2010 to June 2011); in these cases the reference year refers to the year in which the school year ended (2011 in the example).

Aggregation method: Weighted average

Periodicity: Annual

Classification

Topic: Education Indicators

Sub-Topic: Inputs