Reflecting an overall policy shift in Oregon and nationwide, Oregon passed laws in 2013 and 2015 aimed at changing the way school discipline is applied in grades K-12. The 2013 legislation directed districts to replace zero-tolerance policies with an emphasis on preventing and reducing unnecessary student suspensions and expulsions. Suspensions and expulsions are often referred to as exclusionary discipline because they remove students from classroom instruction. The new legislation also narrowed Oregon's requirement for mandatory expulsion for weapons violations by limiting it to incidents involving firearms. The 2015 legislation limited the use of out-of-school suspensions in grades K-5 to situations that pose a risk to the safety of students or school employees. This study examined suspension and expulsion rates in Oregon over a nine-year period (school years 2008/09-2016/17) to determine whether these reforms in school discipline policy were associated with changes in practice, after other factors, such as pre-policy trends and district characteristics, were adjusted. [For the full report, see ED607760; for the appendixes, see ED607761.]