In a Charlotte Mason math education, Arithmetic is the first stream that is foundational for all mathematics. Students begin with counting then progress to the four fundamental operations. In the upper forms, this stream includes consumer math and finance.
Geometry is the second stream that is introduced. This stream begins with students doing hands-on geometry investigations in Practical Geometry.
Algebra is the final stream that begins with Elementary Algebra. Eventually, the geometry and algebra streams converge into Algebra 2, Trigonometry, Pre-Calculus, and Calculus. Upon completing Algebra 2, students are equipped to take Statistics.