This is a basic milestones fact sheet designed to help parents & teachers understand children’s expected addition & subtraction skill at the 6+ level.. Download, Print & Play!. Includes 5 addition & subtraction learning milestones for 6+ students. Each milestone contains an easy to understand guide of what the students should be learning at this grade level. This tool has been designed by pedagogy learning experts Dr Paul Swan, Kristin Humphreys & David Dunstan to help both parents and teachers with home learning.. Available for download after checkout. A copy will also be sent via email