R.R.
I have been doing the same search for the last year. With most public schools cutting funds on full day, it seems that is no longer an option. Many of the private schools are quite spendy, so it really depends on what your limitations are & if you are looking for a regligious affiliated school or not. I am in a similar part of town, so I have lots of relative info fo you. I will warn you that many of these school began enrollment in Feb, so there may be waiting lists.
Here is a list of schools...if you would like more info please don't hesitate to contact me (I have spoken with all of them)!
St. Mary's Catholic School
Holy Trinity Parish School
St. Anthony's Catholic School
St. Cecilia's Catholic School
Swallowtail - Waldorf School
Carden Cascade Academy
Beaverton Christian School/Church
The International School
Living Wisdom
Oregon Episcipal School
Arbor School of Art & Science
Hilltop Christian School
Montessori School of Beaverton
NW Montessori School
Faith Bible Christian School
Southwest Bible School
Horizon Christain School
Life Christian
Best Wishes!!