There are two kinds of Continuing Disability Reviews. One is a Work CDR and the other is a Medical CDR. SSDI benefits can be ceased because of either one.

A person may not have any medical recovery, but may be ceased if they have used their Trial Work Period and are engaging inS Substantial Gainful Activity after a Work CDR. For example, a deaf person or a paraplegic person may not have medical recovery, but are holding down a job and are fully earning over the SGA amount for that year. Still medically disabled, but still ceased on SSDI.

On the other hand, a person who has agoraphobia or severe depression may have medical recovery that is evidenced by their ability to attend college full time and do all that is expected of a full time student. That person may be ceased during a medical CDR because they have demonstrated by their daily activities that their disability is no longer severe enough to prevent them from engaging in SGA, even though they are not working. Also, getting a degree or a certification can improve your vocational profile and make you capable of doing a different kind of job than you did before you became disabled. A former ditch digger who graduates from law school may now be able to work even with a bad back.

These examples seem pretty clear to me. If you have other types of conditions, the decision becomes less clear and more muddy. There is no definitive answer to the question of what happens if you go to school.