Hi, Look at this document, http://www.eriding.net/resources/inclusion/narrowing_the_gap/100819_noriordan_sen_maths_securing_level_2.pdf or Google 'Securing level 3'. Whichever level the children are working at, there are 4 great documents to secure each level. Don't get hung up on doing bigger numbers for HA children and smaller numbers for LA children. Place value is about understanding the value of each digit. Addition is a different concept. They have to have an understanding of place value in order to add numbers, but it isn't place value.