David Hallas


I will be teaching Algebra and Geometry in the Upper School. Over the years,  I have taught mathematics in Illinois, Iowa, and Pennsylvania. I have also taught at the University of Iowa and the University of Pittsburgh. My four adult children are scattered throughout the country in Iowa, Wisconsin, Idaho, and Pennsylvania. During school breaks, I’ll be heading back to Iowa where my wife and I have a home near her aging parents. I’m also looking forward to regularly enjoying the company of my new grandson who lives in Pittsburgh. I am pleased to join the outstanding McLean faculty.

K-12 College Preparatory School Supporting Bright Students’ Individual Strengths and Challenges.

McLean School is an independent, co-educational, K-12 day school serving Maryland, Washington, and Virginia. McLean has for over sixty years been helping students realize their full potential by providing a comprehensive college preparatory program that emphasizes small classes and differentiated instruction. We embrace both traditional learners and ones with mild to moderate learning challenges – dyslexia, dysgraphia, dyscalculia, ADHD, and challenges related to anxiety and executive functioning. Many of our students excel in some areas while benefiting from support in others.
8224 Lochinver Lane, Potomac, Maryland 20854  301.299.8277  admission@mcleanschool.org