The textbook, Differential Equations and Boundary Value Problems: Computing and Modeling Tech Update, by Edwards and Penney needs to be purchased in a form that includes the Pearson MyLab Math online homework platform. There are various options: Option 1: ISBN 9780135998144 MyLab Math access for online homework This options includes an e-copy of the book, but no physical book. Option 2: ISBN: 9780135998137 Differential Equations and Boundary Value Problems: Computing and Modeling Tech Update, Loose-Leaf Edition Plus MyLab Math with Pearson eText - 18-Week Access Card This option gets you a loose-leaf copy of the book and access to MyLab Math for the duration of the course. Option 3: ISBN: 9780135904206 Differential Equations and Boundary Value Problems: Computing and Modeling Tech Update, Edwards and Penney, Plus MyLab Math with Pearson eText - 18-Week Access Card Same as option 2, but a more expensive hard copy of the book. WARNING: If you plan to take MA 303 after MA 266, which uses MyLab Math and the same textbook, you might want longer access to MyLab. You can extend the access by paying extra at the time you register your MyLab account inside Brightspace. If you will take 303 more that a year after 266, you will have to purchase an 18 week access card again. Here's what Pearson says: ---------------------------------------- When students register their MyLab account, they are offered the less expensive 18 week code (one term only) for the $69.99 price. But they will also have the option to buy the 24-month access code for $104.99. That option will allow them to use this for both MA 266 and MA 303. Note that these prices are not bookstore prices. Those are usually much higher. These are the prices when you buy directly from Pearson when you register using a debit/credit or paypal account. ----------------------------------------