Oregon Revised Statutes Education and Culture § 336.465

(a) Give parents, guardians and district residents an opportunity to examine the instructional materials to be used in any class, course, assembly or school-sponsored activity.

(b) Inform parents or guardians in advance of any instruction on human sexuality or human immunodeficiency virus and give them an opportunity to review materials. At the same time, parents or guardians shall be informed that no pupil shall be required to take or participate in any instruction on human sexuality or human immunodeficiency virus if the pupil's parent or guardian, after having reviewed the materials, submits written objection to the school district.