High School Students
Comprehension Difficulties
On average, High School students who received Visualizing and Verbalizing instruction achieved significant improvements in comprehension. They made medium (statistically significant) standard score changes on two of the three measures. Additionally, the 14-point percentile increase in Written Language Comprehension put these students within the normal range (25th–75th percentile).
Results of High School Students Who Received Comprehension Instruction Only

Lindamood-Bell Instruction Implemented: Visualizing and Verbalizing
Years: Jan. 2008 – Dec. 2024
Number of Students: 1,075
Average Age: 16.4
Average Instruction Hours: 107.3
