There are a number of reasons for that difference, including structural / organizational school - based differences between elementary settings and middle / high school settings. (rtinetwork.org)
The Elementary Research Packet shows the results an educator can expect when using Reading Horizons with fidelity in elementary settings. (readinghorizons.com)
«This is a hot topic among parents of the upper elementary set - and it's gotten even hotter since the movie version of Hunger Games came out. (morningsidecenter.org)