A high school composition program for homeschoolers that takes the guesswork out of teaching writing, this program facilitates measurable progress by individualizing a limited number of goals, prioritizing the most essential writing qualities, and providing a logical, developmentally appropriate order for introducing new objectives and goals that makes grading essays so objective that students can grade their own papers. Grading with a Purple Crayon empowers homeschooling teachers to generate efficient writing assignments, analyze their students' strengths and weaknesses, address problem issues effectively, and measure real growth in writing ability.