To earn 1 full Algebra 1 credit, complete all the lessons in Shormann Algebra 1. While there are geometry concepts in those lessons, algebra is integrated and can't be separated from the geometry concepts. However, if your student is taking a stand-alone Geometry course, The geometry concepts learned in Shormann Algebra 1 will make their transition to Geometry much easier.
Please see this article: Should students take a stand-alone geometry course?