I really think you can't motivate someone...the must be motivated themselves. You can certainly support a child. If a child is struggling in a certain school subject, I would find a way to incorporate something they are passionate about into that subject to make the learning fun! For example, if your child is a Lego maniac (like our son) and he was having problems in Science or Math or English etc...I would use the Legos to my advantage and use them to create a learning environment/assignment where he would want to learn. If your daughter is passionate about dolls or art, I would that to my advantage and create an environment using those "props" to teach them. Children will learn quicker and eager when there is something they LOVE or are passionate about incorporated into it!