"Early primary years" refers to the early years of primary or elementary school, typically encompassing the first few grades before reaching intermediate or middle school. Full definition
Do pupils make more progress in earlier primary years, and if so by how much? (blog.nomoremarking.com)
Speaking of the success of programme «My School», which catered to children in pre-school to early primary years, she said: (premierchristianity.com)
First aiders who deal with the early primary years will often attend a paediatric course as well that looks specifically at child or infant resuscitation. (educationbusinessuk.net)