This article is interesting. My first impressions was that it's either the school is poorly run and the teachers are hiding this fact through fluffy language about growth targets, or, the school is rather successful given they're dealing with some of the most vulnerable students around and 0 passed math tests would've been the case either way.
The comments seems to suggest a combination, one person's son went to the school and they said it's been great for his development especially under the first principal but the second principal deemphasized academics and failed to enforce basic anti-bullying rules. Hopefully their new principal will be more like the first than the second.