Because the quality and availability of mathematics learning software has improved significantly in recent years, I now use the EDUCO Learning System for most homework assignments. After you complete an assignment, you can get immediate feedback with your score, answers, and solutions for each exercise. EDUCO will automatically calculate your score on each assignment, and automatically maintain your weighted assignment grade. Each assignment will have an expiration date, after which it will no longer be available. If you do not attempt an assignment before it expires, then your score on that assignment will be 0%.