Percentage of schools with potable water is the share of schools at a given level of education with a drinking water facility or water delivery point that is designed to protect water from external contamination, particularly of fecal origin. Examples of potable drinking water facilities include: pipe-borne water, protected wells, boreholes, protected spring water and rainwater

Percentage of schools without electricity is the share of schools with no access to permanent sources of electrical power, for example grid / mains connection, wind, water, solar, permanently fuel-powered generator, etc.

Percentage of schools without toilets is the share of schools at a given level of education without a pit latrine, an improved pit latrine, a flush toilet, a pour-flush toilet or a composting toilet

Mean performance on the mathematics scale is the mean mathematics score for students in national or international assessments

Mean performance on the science scale is the mean science score for students in national or international assessments

Mean performance on the reading scale is the mean reading score for students in national or international assessments

The percentage of students who achieve the lowest passable grade or above in examinations taking place in the final year of secondary school (Source: Audrey Chapman (2007) Development of Indicators for Economic, Social and Cultural Rights: The Rights to Education, Participation in Cultural Life and Access to the Benefits of Science: p.152)

Technical / vocational enrolment as a percentage of total secondary enrolment is the percentage of secondary students enrolled in technical / vocational education programmes, including teacher training programmes

This indicator measures the proportion of teachers who are not in school although they were expected to be teaching when visited by a survey team, out of all teachers who were expected to be teaching