These hundred chart riddles are a great way to get your students thinking about the vocabulary of math word problems and strategies for solving them. One side of each of these 180 cards features a word problem or number riddle. The answer (in number form) is written on the opposite side. I’ve included two sets of cards. One set includes 2 in. by 2 in. cards. The other includes 3 in. by 3 in. cards. Multiples of five print in blue and multiples of ten print in pink to aid with skip counting and making tens.
In my own classroom, I post these riddles in a big hundreds chart in the front of the room with the riddle side facing out. Each morning, as part of our morning meeting routine, we reveal the number of the day by reading a riddle and discussing multiple ways of solving it.
I will often also build upon the riddle by posing related questions. For example, if the riddle poses a simple math vocabulary question like “How many cupcakes are in one dozen?”, we will go on to discuss how many would be in two dozen, three dozen, and a half dozen, and come up with several ways to find each answer. Many times, this will include coming up to the whiteboard to write an equation or draw a picture, or going over to the hundred chart to demonstrate a strategy there. I also extend the conversation by asking students to agree or disagree with one another, or decide which strategy would be the easiest to use and to explain their choice.
After the riddle is solved, the number remains flipped forward. We continue solving one problem per day until the hundreds chart is completed. At this point, I move the completed chart to another area of the classroom to be used as an additional hundred chart resource and put up a second number riddle chart with the numbers 101-180 in the morning meeting area. This way the problem solving fun continues until our last day of school! Of course, if you have only one chart available, you could simply take down the first 100 cards and replace them with the next set of 80 cards.
This activity takes only about five to eight minutes each day, but really builds my students’ repertoire of problem solving strategies, increases their math vocabularies, and gets them talking about math with energy and excitement! It’s also a great way to make sure you are hitting upon some of the Common Core Standards for Mathematical Practice every day. Those eight practices are as follows:
1. Make sense of problems and persevere in solving them.
2. Reason abstractly and quantitatively.
3. Construct viable arguments and critique the reasoning of others.
4. Model with mathematics.
5. Use appropriate tools strategically.
6. Attend to precision.
7. Look for and make use of structure.
8. Look for and express regularity in repeated reasoning.
To use these cards, simply select the double sided printing option on your printer, and print the cards in the size of your choice onto cardstock, laminate for durability, and cut out. Then place them right in your pocket chart.
Still need a pocket chart to display these riddles? You can purchase one by following my affiliate link to Amazon.com: http://amzn.to/2fpGHfi
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Amanda Taylor @ Second Grade Smiles