Sheikh `Abd al-Rahmân al-`Ajlân, lecturer at the Grand Mosque in Mecca
Indeed, you have no right to distinguish between your children unfairly. This applies to education as it applies to everything else.
However, if your son who studies in private school has special needs that cannot be met by a public school, and for this reason you have to pay for his education, then its alright for you to do so. In this case, you do not have to spend similarly on your other children.
This is an expenditure based on the principle that everyone gets what he actually needs.
Source: Islam Today