Instructors who challenge the validity of a student's diagnosis make the situation worse. Therefore, if you have questions about the validity of a student's disability, please talk to Ivey West in the Center for Writing and Learning about a student's qualifying documentation. However, it does not cure the disability. Also, the effects of the medication are often inconsistent even in the same person. Students with ADHD may, at times, hyperfocus.
Performance can vary significantly from day to day.
A student who does well one day and poorly the next may feel demoralized, frustrated and depressed. Your steady encouragement helps. In general, good teaching for students with ADHD is simply good teaching period. Clear objectives, high expectations, interactive pedagogy and a genuine concern for the individual are best practices. Present all directions in writing.