It’s quarter-final time for Oregon’s prep football teams.  In the 4A classification, No. 1 Cascade Christian hosts No. 9 Junction City, Friday, 7p, Crater HS, Central Point.  No. 5 Henley vs. No. 4 Cascade at McNary HS, 7p.  No. 6 Estacada at No. 3 Scappoose, 7p.  And, No. 7 Banks at No. 2 Sweet Home, 7p.  In the 3A classification, No. 8 Warrenton at No. 1 Vale, Saturday, 1p.  Friday, No. 5 Scio at No. 4 Sutherlin, 7p.  No. 6 Burns at No. 3 Klamath Union, 7p.  And, No. 7 Kennedy at No. 2 Harrisburg, 7p.  In the 2A classification, No. 8 Myrtle Pt. at No. 1 Heppner, Saturday 1p.  Friday, No. 5 Lowell at No. 4 Culver, 7p.  No. 11 Grant Union vs. No. 3 St. Paul, Saturday, 3p, Woodburn HS.  And, No. 7 Knappa at No. 2 Glide, Saturday, 1p.