ISCED-T 2021 12 a. If the intended time is a range of years, the average or most common time
needed to complete a programme is used.
b. If the average or most common duration is unknown, the minimum
theoretical duration of a programme is used for classification.
19. Teaching practice ratio is the ratio of the theoretical duration of the work-based (in-
school) component of the overall teacher training programme relative to the theoretical
duration of the same programme:
a. The teaching practice ratio is expressed as a percentage and calculated as the
theoretical duration of the work-based component (numerator) divided by the
theoretical duration of the programme (including the work-based component)
(denominator). For cross-national comparative purposes one year is defined as 52
weeks.
b. Teaching practice ratio value ranges are specified in Table 1. The ranges are based on
available information and could be further refined during future reviews of ISCED-T.
c. The teaching practice ratio can be applied to both general/academic and professional
orientated teacher training programmes but would be more prevalent in professional
programmes and internship pathways.
d. If the intended time spent on teaching practice is a range of weeks, the average or
most common teaching practice time is used.
e. If the average or most common teaching practice time is unknown, the minimum
amount of time students in a teacher training programme must spend in teaching
practice is used for classification. Table 1: Teaching practice ratios Code Ratio 0
None
1
≤10%
2
>10%, <20%
3
≥20%
