Introduce number writing after students have worked with the Montessori math materials and when they are in their sensitive period for writing. Copy the work sheets and arrange them in a basket with dividers. Students practice correct number formation of 0-4, 5-9, 10-14, and 15-19. They begin on the black dot and trace a numeral three times for effective patterning. This book includes tracer sheets for the hundred board, short chains, decimal layout and missing numbers and blank templates for students to use when copying.