Thank you so much for the responses. DS is currently homeschooled, so I am looking at the test in terms of finding the right curriculum fit for him. I am wondering if I've been teaching "too low."

Based on your recommendations, I went back and looked at his percentages. His scores were mostly between 97 - 99%, with the exception of math (68%) and reference materials (67%). Reading 99, Language 99, Social Studies 99, and Science 99.