I play under an English-style education system, because it’s what I’m familiar with. So my Sims start school the academic year they turn 5. For example: Ronan Edge is the first baby born in this game. He will turn 5 in Winter, Year 6. So he will in fact start school in Autumn, Year 6. So he will age up to child in Autumn, Year 6 and have his fifth birthday the following season.
So the students stay at primary school for seven years and leave when they’re 11.
There are a variety of trips for students at primary school, courtesy of Ilkavelle’s School Trips Events mod.
At the end of the school year, there is a small party for the leavers, where they will age up to teen.
Reception ~ 4-5
Year 1 ~ 5-6
Year 2 ~ 6-7
Year 3 ~ 7-8
Year 4 ~ 8-9
Year 5 ~ 9-10
Year 6 ~ 10-11