US map showing all states highlighted.

All Tier National Results: 2018-2019
School Year

All Tier Groups

Summary of Findings:

Across all grade and ability groups, students who completed at least 120 Reading Plus lessons (~50 hours) during the school year achieved reading proficiency gains that were significantly larger than those achieved by students who completed no lessons.

These results show that students in all tier groups who engaged in the recommended amount of Reading Plus instruction over the course of the 2018-2019 school year significantly increased their capacity to comprehend increasingly complex texts, developed their capacity to understand higher levels of general academic vocabulary, and improved their reading efficiency. Students who completed more Reading Plus lessons achieved significantly larger gains than their peers who engaged in little or no Reading Plus practice. The results also showed that students who engaged in more Reading Plus instruction developed more reading confidence and increased their interest in reading. This in turn increases the likelihood that they will continue to use reading as a means to expand their knowledge, to be entertained, and to seek inspiration.

Study Design:

This report describes the reading progress achieved by Reading Plus student who were enrolled in grades 2 through 12 during the 2018-2019 school year.
The focus of the report is on students who completed the Reading Plus InSight silent reading assessment on at least two occasions, once near the start of the school year and again during the spring, so that growth over the school year could be measured.

Students Excluded
Students for whom valid reading rates could not be calculated.

Distribution of Students

  • Elementary School (Grades 2 through 5) n=46,007
  • Middle School (Grades 6 through 8) n=133,543
  • High School (Grades 9 through 12) n=79,590

Key Results:

Across all grade groups, Reading Plus instruction had a significantly positive effect on students’ self-reported reading interest and reading confidence (self-efficacy). Previous research has found that reading motivation and reading success are closely linked.

Study Profile

Study Sample: 259,140 students who completed two or more InSight reading assessments

Schools: 2,571

School Districts: 1,220

Study Inclusion Requirements:

  • Students in grade 2 through 12 
  • Students with fall 2018 (pre) and spring 2019 (post) InSight assessment scores