Notice how it says in one paragraph: "Rosetta Stone customers tell us the program is equivalent to two years of high school study or one year of college study."
Remember that the most important thing is that the curriculum fits your child. Any curriculum that includes grade 9 in the description would be considered high school level. So Power Glide, for example, is for grades 7 through 12, and it's considered high school level.
Currently, the most popular programs are Rosetta Stone, Auralog, and Power Glide. However, any foreign language curriculum will fail unless you actually USE it. For best results, whatever curriculum you choose, use it for at least 15 minutes each day (use it or lose it.)
Looking for some great homeschooling resources for next year? Check out the new page on my website on homeschooling resources. Click on the selections to go directly to Amazon to purchase!