Here is OLR's Grade Equivalency Chart for this year's IOWAS. 

The chart shows that the longer a student stays at Our Lady of Refuge, the higher they achieve in EVERY subtest.  The third grade is achieving slightly higher than normal without entering into a frustration level for younger children.  In fifth grade the students are achieving from one and a half to two years ABOVE grade level.  The seventh grade is achieving over TWO years above grade level.  This shows a consistency of fine instructional techniques used throughout the school.