We have been practicing counting and writing numbers. To get our brains ready, let's do a count to 100 song. Click here for link.
It is important for us to understand how to write numbers and how to count big numbers because we will use these numbers in problems later on this year.
What patterns do I notice that will help me figure out missing numbers on the hundreds chart?
Today I am going to try my best to trick you!! I am going to cover up a bunch of numbers and see if you can figure out what numbers are missing and then write those numbers in standard form.
Before we do that though, I want us to look closely at the 50 chart.
Guiding Questions: These questions help students focus on the structure of the 100 chart. They are noticing the structure and then using it to help them identify other missing numbers, which is an example of alignment to MP7, "Look for and make use of structure".
I'll chart some of the ideas I hear in partners and refer to the class 100 chart.
We noticed so many new things about how the hundreds chart is set up! This is going to help us as we work on reading and writing the numbers to 50. Remember that our thinking job is: How can I use what I know about a hundreds chart to figure out missing numbers?
I'll hide 1 number while students close eyes. "What number is missing? How do you know?"
I'll hide 3-4 more numbers and follows the same routine, always having students explain their reasoning for how they are sure. Students are working on MP3, Construct viable arguments and critique the reasoning of others, as they explain their thinking.
Missing Number Rules:
I'll model a few rounds on the class hundreds chart, emphasizing the How do you know part. I'll reference the chart from earlier-“I see you know that all the numbers on this row start with a 2-we noticed that earlier on our chart”.
Students play the game using different hundreds chart based on their current understanding.
Group A: In need of intervention
These students will use a number chart to 30. Click here for a 30 chart!
Group B: Right on Track
These students will use a number chart to 50. Go here for a 50 chart!
Group C: Extension
These students will use a number chart to 100.Go here for 100 chart!
See attached video of 2 students in Group C playing the game together. (Warning: It's adorable!)
See attached document for the recording sheet!