I've seen many different sellers on TPT have versions of these types of cards, and I have even made one myself (for compound words) that I've never even used! Although, I have a feeling I'll be making more of these types of cards now!
I didn't know how the kids would react or if they'd even work well. But I really enjoyed this and it seemed like the kids did as well! All you need are a set of cards, these were laminated and were sturdier than regular paper, and clothespins. The idea behind the 'Clip & Flip' cards are to be a self-checking assessment for the students. But since it was our first time using these, I gave each student 8 cards and 8 clothespins. They were allowed to find a spot, anywhere in the room, to work.
They laid out all of their cards and clipped the clip over their answer, and then had to call me over before they could check their work. When I came over, they would flip all the cards over and then, for any cards they got incorrect, we talked about what the correct answer was, and why. Eventually, though, I hope to build them up to a point where they can simply use this as a self-checking assessment and maybe discuss their reasonings with a partner.