High School Model Mathematics Courses for Algebra 1, Geometry, & Algebra 2 (AGA) In high school, the Rhode Island Core Standards for Mathematics (RICSM) are organized by conceptual category rather than by grade level. RIDE analyzed a variety of high-quality curricula and consulted with leading mathematics educators in Rhode Island to design model high school courses for Algebra 1, Geometry, and Algebra 2. The model courses outline the general content expectations for the traditional AGA sequence. The model courses and guidance in utilizing them can be found in in the high school section of the RICSM. Download the High School Model Mathematics Courses for Algebra 1, Geometry, & Algebra 2 (AGA) document.