This FREEBIE is a great resource for students to practice subtraction with and without regrouping of up to 5-digit numbers.
This center self checks in NUMEROUS ways:
--students choose the card that says "start" on the top
--the difference of the first problem will be on another card(if it isn't, they need to rework the problem) and each difference after will be on another card
--after solving all problems, the cards can be layered to spell a word(if they don't spell a word, they need to rework)
I would love to hear your feedback as I intend to create more activities with the same concept--the opportunities for self-checking in this way are endless!