Buying Used Curriculum: Where and What to Check

Buying used homeschool curriculum is the single largest saving available to a homeschooling family, and it’s low-risk if you check four things before you pay: that the edition matches the teacher guide you own or intend to buy, that the set is complete (student book, instructor guide, answer key, any manipulatives or discs), that the consumables are unwritten, and that nothing essential lives behind a non-transferable online code. Get those four right and secondhand is simply the same curriculum at a fraction of the price. Get them wrong and you’ve bought half a program that won’t talk to the other half.

I grew up in a house that bought almost everything used — five kids, one income, and a mother who could smell a mismatched edition from across a church gym. What follows is that inherited checklist, updated for a market that now runs mostly online.

Where used curriculum actually lives

Five places, roughly in order of how much homeschool-specific stock they carry:

• Homeschool Classifieds — a long-running homeschool-only marketplace with listings by publisher, subject, and grade, plus a seller reputation system. The best place to find complete sets rather than orphaned volumes.
• Facebook buy/sell/trade groups — usually organized per curriculum (“Sonlight BST”, “Math Mammoth BST”) or per state. The fastest-moving market and the one where you’ll find current editions. Vet the seller, use goods-and-services payment, and never wire money.
• Local used-curriculum sales — co-op swaps, homeschool convention used rooms, and end-of-year group sales. You can inspect the book, which is worth real money, and you’ll usually walk out with the whole set.
• ThriftBooks and AbeBooks — excellent for trade books, novels, read-aloud lists, and reference titles; unreliable for teacher guides and consumables. AbeBooks lets you search by ISBN, which is exactly what you want for edition-matching.
• eBay and Amazon’s used listings — deepest inventory, weakest descriptions. Fine when you know precisely which ISBN you need.

A reference book is the easiest thing in the world to buy secondhand: The Well-Trained Mind is a doorstop of a planning guide that turns up used constantly, and even an older edition still does its main job of explaining how a classical sequence is built. Reference and read-aloud titles are where secondhand pays off with zero risk.

The four checks before you pay

Edition and ISBN. Publishers renumber lessons between editions, and a third-edition student book paired with a fourth-edition instructor guide will misalign by page two. Ask for the ISBN — not the cover, the ISBN — and match it against the publisher’s current listing. If the seller can’t produce it, ask for a photo of the copyright page.

Completeness. Write down what a full set contains before you shop: student text, teacher manual, answer key, tests, manipulatives, discs or audio, and any separate readers. “Complete set” in a listing means whatever the seller thinks it means.

Consumables. Workbooks, worktexts, and anything with blanks are single-use by design. Ask directly: is anything written in? Ask about the last third of the book too, because sellers genuinely forget that pages 140 onward were done in pen.

Digital access. This is the modern trap. Where a program includes an online component, a video subscription, or a downloadable license, that access is usually tied to the original purchaser and does not transfer. A cheap secondhand copy of a program whose actual instruction lives online is a cheap secondhand paperweight. Check the publisher’s transfer policy before you buy, not after.

Two smaller ones worth thirty seconds: reproduction rights (many publishers license workbook copying to one family only, so a used copy doesn’t buy you the right to print for four children) and smell and damage — mildew is not fixable and moves onto your other books.

What never to buy used

• Consumable workbooks for the current student, unless they’re genuinely untouched and cheap enough not to matter.
• Anything whose core is an online course, app, or video login. Buy that new, from the publisher.
• Programs in active revision. If a publisher is midway through releasing a new edition, the used market fills with the outgoing one and your second child will inherit a mismatch.
• Half a set at a bargain price, on the theory you’ll find the rest later. You mostly won’t, and the missing teacher guide often costs more than the whole set did.

What holds its value

Worth knowing in both directions, because you’ll be selling too. Hardback teacher manuals, non-consumable student texts, literature sets, and manipulatives hold value best — good wooden or plastic manipulatives are nearly indestructible and resell year after year. Popular publishers with long print runs resell fastest, simply because more families are looking. Consumables and anything with a discontinued digital component hold almost nothing.

The practical implication for buying new: when you’re choosing between two comparable programs and one has a strong used market, that program is quietly cheaper, because you’ll recover part of the cost in June.

A realistic price rule

Two rules of thumb, both hedged, because publisher pricing and the used market both move: a complete used set in good condition typically trades at roughly half of new, and a set with written-in consumables or a missing teacher guide should cost a great deal less than that — you’re buying parts, not a program. Before agreeing to any price, open the publisher’s site in another tab and check what new actually costs today. Sellers routinely list against the price they paid four years ago.

For where used curriculum sits in a whole year’s budget, the bands are in what homeschooling really costs — the short version is that the used market is what moves a family from the boxed-curriculum tier to the mid tier without changing what they teach.

Buy the test, not the year

One habit that makes secondhand buying nearly risk-free: use it to trial programs. A used copy of a math program is the cheapest possible way to find out whether your child gets on with its format before you commit to a full year — which is the six-week test in how to choose homeschool curriculum, run at a discount. If it works, buy the rest new and current. If it doesn’t, you’ve lost the price of a takeaway.

The same logic applies before committing to a boxed program: pick up one used level of an all-in-one and see whether the format suits your household before buying the whole shelf, using the format map in all-in-one homeschool programs compared.

FAQ: buying used homeschool curriculum

The best time to buy is late spring through midsummer, when families clear out the year they’ve just finished and the listings are thickest. The worst is late August, when everyone is buying and prices firm up. If you know in June what you want in September, you’ll pay noticeably less.

How do I know the edition is right?

Match the ISBN, not the cover art. Publishers reuse cover designs across editions and change the lesson numbering underneath, which is precisely the mismatch that ruins a set.

Is it safe to buy from a Facebook group?

Generally, with normal precautions: use a payment method with buyer protection, ask for photos of the actual copies including a few inside pages, and be wary of a brand-new account selling several complete sets at once.

Can I resell curriculum I bought used?

Usually yes for print materials — but check the publisher’s terms for anything including licensed downloads or online access, since those are often non-transferable and not yours to pass on.

What about free curriculum instead?

There’s a real free tier — library-based programs, open-source math, and several publishers that give whole levels away as downloads. Free costs printing and planning time rather than money, which is a genuine trade rather than a free lunch, and it’s the tier where a lot of first-year families sensibly start.