She enrolled in a remedial to boost her math skills.

A course or class designed to help students improve their skills.
He took a remedial to help with his reading.
The school offers a remedial for struggling students.
She found a remedial that focused on writing skills.
remedial classes
remedial education
remedial programs
corrective
rehabilitative
supportive
The school offers remedial classes for struggling students.

Related to providing a solution or correction for a problem.
The teacher provided remedial help after school.
She took a remedial course to improve her math skills.
Remedial measures were taken to fix the issue.
remedial action
remedial program
remedial instruction
corrective
restorative
rehabilitative