SB 391, Nevada's Read by Grade 3 Act, became effective on July 1, 2015.This statute was designed to dramatically improve student achievement by ensuring that all students will be able to read proficiently by the end of the 3rd grade. form ssa-3 (09-2015) uf (09-2015) destroy prior editions . It is so called because it is the most important part in a sentence. See more. Some of the verbs in our table are merely prefixed forms of an irregular verb. Notice the use of the