Where should Chinese internal migrant parents locate their school-aged children: migrate with them or leave them behind? And should they invest in private education of their children?   First, we theoretically investigate whether migrant parents can afford to take their children to migrate, regardless of the children's age.  Using an overlapping generation’s model, we find a theoretical optimum that maximizes parents' utility which includes the children's educational performance. Depending on the educational investment parents make and the relocation cost of children, we provide necessary and sufficient conditions for migrant parents to take their children to migrate and whether they should provide their children with private education. Secondly, we investigate weather migrant children’s school performances are better than those of the left-behind ones.  Empirical evidence based on the 2009 wave of the Rural-Urban Migration Survey in China (RUMiC) data suggests that younger migrant children's school performances are better than those of left-behind children. This gap disappears with the age of the children.