The ISL website is misleading because they do not place children in groups according to age. The placement is based on their view of your child's ability. Your child could be a star in your home country, but you may find him/her sharing a class here with children a year younger. I think this is the way they weed you out if they don't want your children. So, beware, don't hand over any fees until you get some straight answers, or you have a solid recommendation from someone else - whose children are actually at the school.