In 1st through 4th grade students are taught core skills of language arts and math through main lesson blocks, supplemented by 2-4 skills classes per week, all taught by their class teacher. As of 5th grade, the class teacher is assisted in the teaching of these core skills by subject teachers. At the Siskiyou School students from 5th-8th have four periods of math instruction per week and four language arts periods per week. Classes are split for math in with each of the two middle school math teachers taking a group. English instruction is split between two literature classes and two language arts skills periods. The teaching of those classes is usually shared between the class teacher and the middle school language arts teacher.