Reading comprehension is a critical skill for job performance and advancement within the military. Many newly enlisted and veteran soldiers experience difficulties in mastering core content to meet basic and advanced requirements because of poor comprehension skills. For example, it has been noted that twenty-five percent of the Navy's enlisted population, score below eighth grade levels in basic academic skills. These failings delay assumption of duty and limit job advancement, both of which are detrimental to performance and efficiency in the military. GradAtions, a web-based intelligent tutor funded through the Navy, helps in the improvement of reading comprehension skills and the ability to learn new information from text in an efficient manner. It may be used with any text including technical manuals, workplace related documents, instructional materials, etc. thus supporting content learning while developing comprehension. Based on well recognized cognitive models in reading and learning, the technology utilizes summarization to improve comprehension and to measure how well a learner understands the information. The key innovation in this intelligent tutor is the design and integration of several text analysis algorithms, including semantic analysis, for performing the automated evaluation of the natural language summaries provided by the learners. The design also recognizes the strong correlation between vocabulary and comprehension. Its "tutors" assist with vocabulary, sequencing, fluency as well as summarization. Utilization GradAtions in three different studies has consistently demonstrated improvement in reading comprehension skills one year or more. The most recent study at Great Lakes Naval Training Center has noted preliminary results of over 2 grade levels.