(Purpose) This study aimed to evaluate the efficacy of Imagine Math by comparing the performance of program users and non-users on the NWEA MAP Growth Math assessment. (Methods) Propensity score matching was utilized to compare statistically similar southeastern U.S. charter school students who used or did not use the Imagine Math program during the 2020-2021 school year. Imagine Math users and non-users were matched based on baseline performance and demographics and compared based on NWEA MAP Growth Math assessment performance. (Results) Use of Imagine Math was found to generate a positive and statistically significant impact on students' mathematics performance. Imagine Math users scored an average of 2.00 points higher on the Spring 2021 NWEA MAP Growth Math assessment than statistically similar non-user students. Grade-level models revealed statistically positive effects for Imagine Math students in Kindergarten through 8th grade with all findings being statistically significant except for Kindergarten. (Implications) Results show that students who used Imagine Math scored higher on the NWEA MAP Growth Math assessment than similar comparison students. Thus, this study provides evidence that the use of Imagine Math supports students' mathematics achievement. [This report was prepared by Imagine Learning.]