如果父母本来计划为孩子付学费的话

那么这个责任不该因为离婚而改变。

http://family-law.lawyers.com/child-support/paying-for-college-when-parents-are-divorced.html

Generally, a noncustodial parent bears more responsibility for college costs. But a judge will try to ensure that in complex custody situations, one parent isn’t unfairly saddled with a child’s higher education bill. Specifically, courts will weigh several factors to determine if one or both parents should pay for college and if so, how much. These factors include, but aren’t limited to the following:

• each parent’s financial situation
• each parent’s level of post-high school education
• whether the parents would expect their child to attend college if they were still together
• the child’s academic achievements and goals
• the non-custodial parent’s debts and assets
• the child’s access to financial aid in the form of scholarships, grants, and loans, and
• the child’s ability to earn income while in school.

Depending on the laws of your state, a judge may weigh the above factors and others to determine if a college support award is appropriate. If you don’t want to leave things up to chance, but still want to ensure that your child receives adequate support, you should consider a voluntary college support agreement.