I don't see where anyone has shared it yet, but the Homeschool Buyers Co-op is offering a Mother's Day freebie again this year. You get your choice of one free item from their Vendor Hall page now thru Saturday 5/14.
If you're not a HSBC member yet, you will need to join before taking advantage of this offer (It's fast and free.) and if you could use my affiliate link I'd really appreciate it. :) (You also earn 100 smartpoints just for joining.) My affiliate # is:138440
It looks like they're offering some Bravewriter guides, a Critical Thinking Company book, some Evan Moor books, and more!