Dohrmann, K. (2003) – Outcomes for Students in a Montessori Program, A Longitudinal Study of the Experience in the Milwaukee Public Schools
- "This study supports the hypothesis that Montessori education has a positive long-term impact. Additionally, it provides an affirmative answer to questions about whether Montessori students will be successful in traditional schools."
- "A significant finding in this study is the association between a Montessori education and superior performance on the Math and Science scales of the ACT and WKCE. In essence, attending a Montessori program from the approximate ages of three to eleven predicts significantly higher mathematics and science standardized test scores in high school."