There are days leading up to break when you want to do something:
4. engaging that will keep everyone's attention!
It's that time of year when teachers need a math game idea. My post about activities to do the last weeks of school is one of my most viewed because of this exact thing.
I wrote about this game, "Draw 10", in the post I mentioned above, but I don't think it got much attention, probably because I didn't explain it well or give examples of how it will look as you play it, so I wanted to fix that. This game is fun for grade levels 3-12. With younger kids you will want to play the whole numbers version, while older students will be more challenged by the decimal version. ((Speaking of older kids, it would be really interesting if someone adapted this into another base besides base-10!))
To play Draw 10 you will need:
1. The game boards printed for your students. I usually try to fit quite a few on one piece of paper so you can play several rounds.
2. A way to choose numbers 1-9. Ideas for this are playing cards 1-9, index cards with numbers 1-9, or a random number generator app/website on your phone, tablet, or computer.
Each student uses a new table each game. Before you begin, you set a goal. For example, "1000." You draw a card from the pile and announce it to the class. Let's say you draw a 6. Students can either record the value in the hundreds, tens, or ones column (600, 60, or 6) and put the total on the right. You have to play that number at that time. The number 6 goes back into the pile-- every number has an equal chance of occurring each round (students often think if a 6 has been drawn, it is unlikely to be drawn again-- nice chance to talk about probability!) Next round, draw another card. Students choose a column and record, adding that value to the previous total. You can't go back and change any values and you must play all 10 rounds (even if you have already met the goal). Also, each student might choose a different column, so their totals are different. At the end, whoever is closest to the "goal" wins.
What it might look like to play:
Goal this round is set as 1000.
Let's say you draw a "3." Student A could make it worth 300, 30, or 3. Here is a student making it in the 10's column, so it is worth 30. They right their current total.
The next draw might be "4." Here Student A chooses to make that worth 400. They put their current total as 430, which is adding the values from round 1 and 2.
Here is an example of a different student (Student B) playing the same game. They choose to put both rounds in the 100's place, so their total is 700 instead of 430.
Here are what the game board might look like after you play all 10 rounds. Remember, students must play all 10 rounds even if they go over the goal. Also, you have to play each round at the time the number is called (you can't go back and changed previous rounds).
Student B wins because they are closest to the goal of 1000.
How it might look to play with the decimals:
Goal is set at 3.
Student A wins because they are only .15 away from the goal. I like to play that it is okay to be over or under, just whoever is closest to the goal wins. (this gives an opportunity to connect to absolute value)
Ideas and modifications to consider or try:
1. Let all or some students use a calculator
2. Experiement with different goals. What does a really large goal do to game play? How about really small?
3. Let students "go back" and change one value they regret
4. Let students work in partners
5. Play as a station game instead of as a class
6. Play this game at another time of year, maybe when discussing place value!
7. Use this game to talk about some other math topics that come up during play such as probability and absolute value (distance to goal number).
8. Have students discuss in groups or class their strategies.