Another thought: while remediation is extremely important, you might also want to balance it with some enrichment in your DS' area of strength. That may be math or science with his high block design score.

Kids don't like to work in their area of weakness all the time any more than we do as adults. This is a mistake I made with my son. His frustration level with having to work on reading and writing all the time (his two worst subjects) was very high. I think it would have been better to balance that important work with instruction and play with math and numbers which come so easily to him.