Harl R. Douglass

1892 – 1972

• Algebra
• Proceedings of the 1970 Heat Transfer and Fluid Mechanics Institute
• Secondary Education for Youth in Modern America
• Teaching in high school
• The junior high school
• Everyday arithmetic
• Relationships between qualifying examinations, various other factors, and student teaching performance ...
• Senior mathematics
• The Douglass standard diagnostic tests for measuring achievement in first year algebra
• The high school curriculum