A decision in this regard is expected to be taken at the Kendriya Vidyalaya Sangathan Board meeting here tomorrow after a committee set up to look into the issue favoured such a move.
The move would be in keeping with the provisions of the RTE Act which has sought 200 working days for classes I to V and 220 days for classes VI to VIII, sources said.
"There is a strong feeling among teachers, parents and students about having five working days," they said.
The move could also help schools reduce energy consumption, it added.
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The RTE Act also mandates 800 instructional hours per academic year for Stds I to V and 1,000 instructional hours per academic year for sixth to eighth classes.
It also says that the minimum number of working hours per week for a teacher should be 45. This includes both teaching and preparation time.
With the introduction of a five-day week, the number of school days will come down from 234 to 207 for classes I to V, sources added.