In the 97222 zip code, your neighborhood high school would probably be Milwaukie High School, which is in the North Clackamas School District. If you are interested in the International Baccalaureate program at Cleveland, you should also check into the same program offered at Rex Putnam High School (also in the North Clackamas School District).
For standardized school ratings, you can check out the Oregon School Report Cards at: http://www.ode.state.or.us/data/reportcard/reports.aspx and select the school district from the pull-down menu on the left side of the page.
Open Enrollment in schools is now a statewide Oregon LAW (House Bill 3681), effective January 1, 2012. Schools cannot prevent students from transferring out of their school or district. However, they can choose to opt-in, or not, to allow students outside their disctrict to transfer in. For example, Clackamas High School may lose 200 kids who choose to transfer to other schools that opt-in to open enrollment. But, they can choose not to opt-in, and new students outside of district wouldn't necessarily be able to fill those 200 spots.
This year, schools were required to decide if they would open enrollment to students outside their district by March 1, 2012. The annual open enrollment period took place March 1 through April 1. This law applies to grades K-12 and there would be an annual enrollment period each spring.
When I contacted the Oregon Department of Education (main phone 503-947-5600) to inquire about a list of participating schools, I was told there is no centralized list--families must contact the school district they are interested in and ask them directly, and fill out their transfer form, often available on line.
I hope this helps!