Correct spelling, explanation: both enrol and enroll are correct, and you can use the one that aligns with the conventions of the English variety you are writing or speaking in. If you are writing for a British audience or following British English conventions, you would use enrol. If you are writing for an American audience or following American English conventions, you would use enroll. Just remember to remain consistent.

Definition of enrol:
Verb, to put yourself or someone else onto the official list of members of a course, college, or group
Students are encouraged to enrol in the advanced mathematics course to challenge themselves.
Parents can enrol their children in the after-school program for additional educational support and activities.

Collocations with enrol:
Some most commonly used collocations include:
1. Enrol in a course: this collocation is used when signing up or registering for an academic or educational course.
She decided to enrol in a photography course to enhance her skills.
2. Enrol in a program: similar to enrolling in a course, this collocation is used for more extensive educational or training programs.
Many students choose to enrol in the language immersion program.
3. Enrol in a class: this is similar to enrolling in a course and refers to registering for a specific academic class.
It’s essential to enrol in the required classes for your major.
4. Enrol in a school: this collocation is used when parents or students register to attend a particular educational institution.
Parents often need to enrol their children in a suitable school for the academic year.

Correct spelling, explanation: both enroll and enrol have the same meaning and function as verbs, referring to the act of registering or signing up for something, such as a course, program, or membership. The choice between enroll and enrol depends on the variety of English being used. In American English, enroll is the standard and preferred spelling. In British English, both enroll and enrol are recognized, but enrol is more commonly used. So, the main consideration is to use the spelling that is consistent with the conventions of the English variety you are writing or speaking in.