Dundee secondary pupils will finish school before 3pm two days a week once a controversial 33-period week is introduced.
Pupils will also have different lunch times depending on how many periods they will be in class each day under new proposals put forward by Dundee City Council.
Plans for a 33-period week in secondary schools were announced in early November.
The local authority altered its original timetable following a consultation with parents and the schedule has been revealed in a letter to parents of pupils at Grove Academy.
The timetable reflects concerns about the long afternoons by scheduling two, rather than three, classes after lunch.
This will mean the timing of lunch will vary with different starting times on short and long days.
An earlier start time of 8.45am has also been implemented, meaning the seven-lesson days would finish at 3.40pm.
The six-lesson days would finish at 2.50pm.
Each class would be 50 minutes long, with three school days comprising of seven lessons and two days of six lessons.
The proposals would also see one of the seven-lesson days moved from Wednesday to Monday to better accommodate extra- curricular activities.
Schools would be left to make their own arrangements for registration and tutor time.
Education convener Stewart Hunter said: “I think we’ve managed to listen and enact most of the feedback we received from the first model we put forward. We wanted to check that the changes we’ve made are right.
“We want the process to happen as quickly as possible, but it’s important to get it right it will take as long as it takes.
“I’m keen to do what I can to continue to improve education in this city.”
Mr Hunter said that he hopes to find a suitable solution in time for the new school term, but he added that this is dependent on how people react to the new proposals.