ADHD (Attention Deficit/Hyperactivity Disorder) is a common neurological disorder that causes a person to have difficulty self-regulating (Daley & Birchwood, 2010a). A child displaying symptoms of ADHD may be impulsive, hyperactive, and/or inattentive, which increases the likelihood of academic failure and behavior difficulties. While symptoms are usually present at birth, a child is often not diagnosed until school age when symptoms have a more significant impact on academics (Silk et al., 2016a). Teachers are often the first ones to notice ADHD symptoms because teachers know how a neurotypical child behaves (Al-Omari et al., 2015a; Bolinger et al., 2020). The Montessori method is a nontraditional teaching method rooted in therapeutic and special education features. Montessori methodology approaches a child's attention differently than the traditional (non-Montessori) classroom. Through this quantitative comparison study, the researcher assessed the current level of knowledge about ADHD among Montessori and traditional (non-Montessori) elementary teachers across Louisiana. Participants answered a brief demographic questionnaire, The Knowledge of Attention Deficit Disorder Scale (KADDS), and optional open-ended questions. One hundred forty-three participants completed the survey. T-tests were used to compare the KADDS overall scores and sub-scores between Montessori and traditional teachers. Major findings from the research indicate that teachers in Montessori schools possess more knowledge about ADHD, according to the KADDS survey. However, many teachers fell within the mid-ranges, indicating further need for ADHD training concerning facts and misconceptions. Comparisons and implications of the current study are discussed, and recommendations are presented. [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.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]