Where to buy books, curriculum, supplies

Portland Local Stores

Lakeshore Learning - Teacher supply store in Lake Oswego, near the Bridgeport mall off I-5.  Products are primarily for ages K-6, aimed at school teachers, but they have a huge wall of workbooks on every subject, plus white boards, math games, flash cards, etc.  Also online but there is a better workbook selection in the store and you can flip through them.  Frequent coupons and a teacher discount for homeschoolers.

Powells Books - Local stores in Portland have lots of non-fiction source books, used!  Also some teaching resources in their Education department.  

Barnes and Noble - Retail bookstores with lots of fiction and some non-fiction for kids.  They do have a small selection of school work books, but the selection at Lakeshore is much better.  Barnes and Noble has an Educator Discount card, which is 20% off books, with no annual fee.  (Bring your ESD confirmation letter to the store to sign up.)

Exodus Books - A homeschool curriculum store in Oregon City, primarily focusing on faith-based curriculum but there are other offerings.  A good place to browse if you are completely new to the idea of curriculum and what it looks like.  They also accept and re-sell used books.

Online

Direct from Publisher - Every curriculum publisher will have their own sales outlet for brand new material.

Rainbow Resource - A huge inventory of curriculum books, supplies, learning toys and games, usually for discounted prices.   For curriculum it helps to look at descriptions and reviews elsewhere, then buy on Rainbow.

Amazon - A good place to look for new workbooks, used textbooks (cheap), and to find supplies such as white boards, your favorite erasable pens, workbooks and technology.

Homeschool Buyers Co-Op - A membership based discount buying group, for more than just curriculum.  They also negotiate discounts with online vendors for subscription based services.  

eBay - Lots of used curriculum books are cheaper on eBay.  

Facebook curriculum sales groups - Many buy/sell groups exist - find what you are looking for or sell the stuff you don't need.