For the past few days, I've really focused instruction on the first graders who are just beginning to work on addition stories. Now that they have a pretty solid grasp on what is expected of them when it comes to solving and recording a solution for a combining problem, I was able to assign this group independent work and focus my instructional efforts on the second graders who were ready to take things a little further.
The older group is totally fluent with basic combining stories (i.e. "There were 3 dogs. 2 more came. How many do are there now?") Today we worked with a more challenging vaersion of this kind of problem-- the missing addend combining story (i.e. "There were 3 dogs. Some more came. Now there are 5. How many more came?")
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