Ocean Facts math center will cover the common core standard 1.OA.C.6 which is adding and subtracting within 20. More specifically it covers the adding portion of this standard but modifications could be made for it to cover subtraction. All the teacher would have to do is make new facts cards. So this is center is simply for them to practice them so that they can memorize their facts and practice mental math.
** You will need to print and cut out all the fish.