Even though Christmas is in full swing in my class and I'm sure yours too, I thought I would share something I use year round cause it just works so well. I call it Guess My Number, it's a Math game. Basically, in 1st grade we play it as a whole class activity. So, one child chooses a number from 1 to 120 and keeps it a secret. I have that person come in front, just makes it easier. The rest of us can ask 10 and only 10 questions to the child in front in order to be able to guess the number. The trick is that the questions have to be asked so that only a YES or NO answer is given. For example, the child in front chooses 77 as their number and the first question is - is it greater that 50? Answer - YES. And we continue like that, trying to ask questions that narrow the field. My kids are so good at it now, they can get it in 7 questions or less. I keep track of how many questions have been asked and usually I don't allow them to guess the number until it has been fairly well narrowed down. And guesses count as questions.
It will bring out the best in your kids, truly. They will be using their Math vocabulary without even really knowing it. Typical questions are - Is it even? Is it a 1 digit number? Does it have a 5 in the ones place? Is it less than 50? If they are able to guess in 10 or less, it becomes the next child's turn, usually whoever had the correct guess. If not, the child in front has another turn. Here is the number chart I use. I put it up on my smart board and that way I can cross out rows of numbers that have been eliminated as the questions are asked. Try it, you'll love it! Just click on the chart.