Is the Saxon Math Course 3 the same as Saxon Math Algebra?

Saxon Math Course 3 will take students all the way through sine, cosine, and tangent, factoring polynomials, and rationalizing a denominator (to name a few) which have traditionally been taught as part of Algebra I. My students tend to test into Algebra 2 when they go on to high school.

The curriculum is rigorous, and since I teach in a small middle school, I have chosen to teach Course 3 over two years - completing the first half in seventh grade, and the second half in eighth grade.