Search online for sites that offer free courses in your state. The website, K12.com, is a great resource for online high school credits. Take your time to determine which courses are accepted in your state.
Speak with a high school guidance counselor or teacher about options for getting extra credits. They may know of some resources you did not find in your Internet search. These professionals also can help you determine if the courses you have found will count toward your diploma in your state.
Enroll in the courses of your choice. Pay careful attention to enrollment requirements, enrollment periods and the length of the course. Some courses have set due dates for assignments, while others allow students to work at their own pace.
Obtain any materials necessary for the class. Some courses may require that you purchase books or other texts, either online or in print. Also, make sure you have easy access to a computer with an Internet connection at all times to complete your coursework.
Complete all the required coursework within the allotted time period. Keep careful track of due dates and test deadlines. If you do not complete all portions of the course, you will not receive credit.
Once you have completed all the coursework, be sure to fill out any paperwork required to receive your credits. Have a high school guidance counselor or teacher check to make sure everything is in order.