Saturday, December 8, 2012

Addition and Subtraction Strategies Math Huddle (Bansho) Lesson

We have been doing a WHOLE lot of adding and subtracting in my class these days! Whew. Here is a look at some of the things we have been doing. (This post is very picture heavy.)

Addition and Subtraction Anchor charts.







Addition and Subtraction Math Huddles



We started with these 2 questions, the first was designed to get the students thinking about regrouping and the second was a typical addition word problem. 

My math huddles are set up so that the students have a minds on (Getting Started) type question that we discuss together. Then we share the lesson problem and often discuss possible strategies together. 

Then I send them out to work on it...usually in pairs or groups. 




I post up most of my student's own work and use that as the teaching point for discussions. 


If there are any gaps then I fill in with what I want the students to learn. 








I often recopy my student's examples so it is a little easier for everyone to read and on the day after the "Working on It" we revisit the learning and annotate the learning. **This can also happen right on the day of working provided that students are able to reach the solutions to the problems within the class time. **


Once we started to feel good with the addition strategies we moved on to subtraction, and the lesson cycle repeats again. 


Getting Started



Lesson Problem


Working On It- this was added underneath the addition examples from our earlier lessons







Finally, anchor charts of big ideas are created or shared. I actually used the annotations on each strategy as the big ideas for this math huddle and then posted these anchor charts that I found online at the Jordan School District. 



And now we practice!! Even though the majority of my Grade 3 students are proficient using the traditional regrouping algorithm for 3-digit addition and subtraction I have insisted that they practice all 5 strategies we studied. It's amazing how many of them have memorized the steps but are unable to communicate their knowledge of place value by using a variety of strategies. The work continues!!

4 Brilliant Teaching Thoughts:

Donna Boucher said...

Wow! What an awesome post with so many great anchor charts. I'm featuring this post on Bagels and Blogs tomorrow. :)

Donna
Math Coach’s Corner

Linda said...

Oh my gosh, Beth! I just came from Math Coach's Corner and I had no idea I would be visiting a treasure trove of fabulousness!!
I'm your newest follower and just love the anchor charts! They'll be so helpful for me as we work through learning new math strategies.

I'm with you in the struggle to help kids communicate their thinking. Often my kiddos can explain the how but not the why, so we continue to soldier on!

Thank you so much for sharing these!
Linda
AroundtheKampfire

Beth said...

Wow, Linda!! Thank you so much. Your words are very kind and mean a lot to me. Thanks for taking the time to leave such a thoughtful comment.
Beth

Jack Foster said...

That kind of lesson is the most common things that needs to be learn by many students in order for them to become knowledgeable in mathematics.

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