There are many ways for your child to get the courses he/she needs to complete high school.

Homeschool Co-Op- Parents come together and agree to teach a subject or two in exchange for their child (children) attending. This usually meets once per week.

Tutors- There are many people who specialize or have degrees in the subject(s) you need. Although this tends to be more expensive, it is a very viable option.

Video Schools- Both Bob Jones University Press,  ABeka Curriculum, among others, offer videos for High school subjects. One drawback is that in many cases, you can only use them for one child.  There are numerous FREE resources on-line at your disposal to aid as well.

Exchange- You and another parent get together and agree to teach the subject of your choice to each others children.

On-Line Classes through the Internet- There is a growing number of classes available through the internet. From Web sites with lessons and email access to teachers, to once a week fully interactive real-time classes, the internet just may be the next real alternative for homeschoolers.