Elementary math books are available for sale directly from the publishers, or buyers can shop for new and used books through online sites such as Amazon.com and eBay's textbook store, Half.com. Math books may be sold with or without supplementary materials such as test booklets or answer keys. Teacher's guides are also available, and they can provide answers to problems in the book and additional explanations.
Buying used textbooks can help shoppers save money, but it is important to verify that the edition is current and that the book is in good shape. Defects such as highlighting, missing access codes or torn pages should be noted in the item's description.