The purpose of this quantitative correlational study was to determine if and to what extent correlations existed between the 2019 Posttest Lexile reading comprehension measures and student reading comprehension activities. This purpose had two focuses: (a) to assess if a correlation existed between 2019 Posttest Lexile reading comprehension measures and the total number of lessons completed over the 2017-2019 academic school years; and (b) to assess if a correlation existed between 2019 Posttest Lexile reading comprehension measures and the average first try score for Achieve3000 Step 3 reading comprehension assessment activities completed over the same time period, while using archival data from the Achieve3000 database for Deaf and Hard-of-Hearing (DHH) residential school adolescent students. The universal design for learning and the Lexile framework for reading, centering the promise of the Achieve3000 Learning System's construct, provided the theoretical framework for this study. Two research questions were answered using Achieve3000's archival data based on a convenience sample of 146 6th-12th grade adolescent residential DHH students who used the online Achieve3000 Learning System during the three 2017-2019 academic school years at the Florida School for the Deaf. Pearson's r Correlational Coefficient statistical analysis results indicated that a strong statistically significant positive correlation existed at the 0.01 level (2-tailed) between DHH students' 2019 Posttest Lexile measures and their averaged first try scores of the Achieve3000's Step 3, reading comprehension assessments (r = 0.808, p < 0.0005, 2-tailed). Future research of this innovation and subgroup of learners must be continued. Conclusions, implications, and recommendations for future research followed. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]