Schools which fail to make reasonable adjustments for disabled pupils may find themselves taken to an independent tribunal by dissatisfied parents.
Legislation coming into effect this month makes it unlawful to discriminate against disabled children's participation in all aspects of schooling.
Charity Contact a Family, which supports parents of disabled children, says it will back any parents who decide to take a school to a tribunal.
It has been busy informing parents about their new rights under the phasing in of the disability provision part of the Special Educational Needs and Disability Act 2001. The legislation does not require schools to make physical changes but does require them to amend or justify discriminatory policies, said a charity spokesman.