Veronica,
When I taught LD resource, I always felt like I was spinning my wheels, that the kids were not really progressing. Then I'd do my end of the year assessments and found out that they really had learned alot. So, congrats on your testing results, and know that you are reaching kids. And I would guess you are teaching many other things besides "the test," and your students are growing in ways that no test can assess. All your efforts are worth the energy spent. Go forth and teach! And then ride all your frustrations away!
Jan