Today's lesson covered related facts or fact families. I had Gracyn try to recognize a fact family to quickly solve problems instead of using addition and subtraction for each problem within a fact family. We focused on a few rules. The whole begins the subtraction sentence and ends the addition sentence, there are four related facts, two addition and two subtraction, and that each number is in all four facts. To supplement the lesson, Gracyn rolled two dice, added them together to make the 3rd number, and wrote a complete fact family. Finally, Gracyn completed a 3 digit addition word problem on the white board.