Expert TA is a commercial online homework and tutorial system for introductory level physics courses. It was designed to grade problems the way instructors do; considering more than just a student’s final answer. Solving physics problems involves numerous steps such as applying equations, drawing free body diagrams, etc; to solve for numeric answers. Expert TA’s problems are all multi-step and involve these aspects of problem solving. With a sophisticated math engine, Expert TA is able to grade student equations in detail, in a manner similar to how you or your TA would. It identifies detailed mistakes within equations, deducts points, and provides specific feedback. In Homework Mode, students are provided with a detailed grade report after the assignment due date. In Tutorial mode, students can access hints and feedback is provided instantaneously. Expert TA has partnered with talented professors, leaders in physics education, to develop a rich library of original problems. Users of Expert TA have discovered the power of detailed/sophisticated grading over simple right vs. wrong grading. Instructors are provided with a much more accurate assessment of students’ work and students are provided with the feedback required to help them master concepts.Inaccurate data? Flag it here.