A comprehensive 15-problem final mastery assessment for numbers 1-20. The assessment is structured across three pages: Page 1 covers primary counting and drawing representations (Problems 1-3); Page 2 focuses on drawing representations and number sequencing (Problems 4-7); Page 3 addresses relative logic, comparisons, teen decomposition, and a final master count (Problems 8-15). Includes a formal instructor evaluation section with a 15-point mastery score tracker. Spacing has been optimized for student drawing and writing areas. Corrected numbering and distribution to ensure all 15 problems are present and clear.