I have been a fan of Dover Publications ever since I discovered their series of historical paper dolls as a girl. As a mother now I appreciate the hundreds of wonderful titles they offer that are just right for homeschooling families.
Dover offers a weekly free e-mail sampler for teachers that includes pages from their many books for children. Pages include brain-teasers, science projects, stories and poems, nature illustrations, coloring pages and more. They also offer special sales for teachers. Click here to sign up.
Please note that Dover is not a Christian company and not all of their books are edifying. They do carry books that I would not recommend, so please be cautious as you peruse their catalog.