You may do self study or attend a preparatory school, which can be online or offline. I've always wondered https://exambugs.blogspot.com/2021/06/subject-verb-agreement-test-answers.html
Our community is FREE to join. To participate you must either login or register for an account.
Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. View our Privacy Policy.
Astronomy Magazine