Progression to secondary school, national source (%)
The main issue associated with this indicator is that at the time of data collection schools may have difficulties distinguishing between new entrants and repeaters. The quality of the indicator can also be affected by students who dropped out and changed  schools. The data derived from national sources may differ from international sources because of divergences in definitions, methods of calculation, or in some cases due to different underlying data.  For these reasons, the data based on national sources in this database should not be used for making comparisons between countries, but rather for assessing the progress of individual countries.
This indicator measures the number of new entrants to the first grade of secondary education (general programs only) in a given year, expressed as a percentage of the number of pupils enrolled in the final grade of primary education in the previous year. Country-specific definition, method and targets are determined by countries themselves.