From 12 months
From 3 to 6 years old (1st year (PS)/ 2nd year (MS)/ 3rd year (GS))
From 7 to 9 years old (1st year (CP)/ 2nd year (CE1)/ 3rd year (CE2))
From 10 to 11 years old (4th year (CM1)/ 5th year (CM2))