To teach high school geometry to your students, you must have a curriculum that makes learning geometry easy. Whether you choose a textbook or DVD/workbook combination, you need to preview the book to make sure it is something both the parent and the homeschooler can understand. According to CathyDuffyReviews.com, some geometry curriculum programs that are good for independent homeschoolers to learn on their own are Teaching Textbook Geometry, Ask Dr. Callahan, and The Teaching Company. These curricula are a combination of textbooks or workbooks and videos and are perfect for learning without a professional teacher.
Even when using the best curriculum, students run into problems and need extra help. Usually your homeschooler will need the concept introduced in a different way than the curriculum presents. In these cases, online tutorials are very helpful. The good news is that several tutorials can be found online and they are free. Khan Academy, for example, utilizes YouTube videos to teach students math and is a great back-up program to your main homeschool curriculum. Analyzemath.com is another online geometry tutorial that allows the student to visually see how the program is worked out, which is often all the student needs.
If the curriculum is not working, and viewing geometry tutorials is not making a difference for your child, you will need to hire a tutor. Tutors are available in almost every community in the form of more experienced students, college students and professionals. When you can't get an in-person tutor, you should be able to get a tutor online who can work with the student over the Internet.