Yes IEP's are legally binding. Ask to reconvene his IEP team to modify and adjust goals and objectives. That it is not done in the regular classroom is a bunch of malarky, that is the goal of SPED, to get kids out into the mainstream as much as possible. The IEP is the place to clarify where and when any modifications and accomedations are to occur and what personnel is responsible for providing and implementing that goal/objective. They should also be providing regular progress reports of how the child is progressing. All of these records for IEP's are kept in a blue file that follows the child throughout school. If they are on a 504 plan there should be a yellow folder. This is standard practice.