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##### Long Division

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 MrsBaldwin Joined: Jul 2009 Posts: 37 Junior Member
MrsBaldwin

Joined: Jul 2009
Posts: 37
Junior Member
Long Division
04-19-2010, 06:00 AM
 #1

Hi everyone! I am having an observation next week, where my assistant principal has already informed me that my fourth grade gifted unit is most likely going to be eliminated next year, so I have to make sure that this observation goes really well. The observation is going to be on math, and we are studying long division. Any great lessons out there that you all have that you might be willing to share? Maybe involving the smartboard? Anything would help. This is my first year teaching fourth grade gifted, from a kindergarten room, and have been scrambling all year!

Thanks =)

 athurn Joined: Apr 2010 Posts: 25 New Member
athurn

Joined: Apr 2010
Posts: 25
New Member
Division
04-19-2010, 06:15 PM
 #2

This isn't really great, but just an idea. When I teach long division we use the saying, "Does McDonalds Sell Burgers?" I write that on the board and talke about what each letter stands for. I draw the symbol above the letter. D=Division, McDonalds=Multiply, S=Subtract, and B=Bring Down. The kids catch on to it very quickly! As we do each step, we cross out the letter!

 cjn Joined: Mar 2008 Posts: 212 Full Member
cjn

Joined: Mar 2008
Posts: 212
Full Member

04-19-2010, 06:19 PM
 #3

Teaching the partial quotients algorithm might be a different approach.

 kmob Joined: Apr 2008 Posts: 1,204 Senior Member
kmob

Joined: Apr 2008
Posts: 1,204
Senior Member
04-20-2010, 04:12 AM
 #4

Here's a link to some good division games that can be played on the smartboard. http://www.internet4classrooms.com/s..._4th_grade.htm
I really like "draggable division" to go through all the steps...you can easily have students doing the problems at their seats while others are at the SB. I like that it's on graph paper to show how to line up the numbers. I also sing a song to teach the steps:

First you estimate what the answer might be
Then you div-i-ide
and check it by mulitplying
and bring it on down
bring it down,
look around,
are you at the end?

If the answer is yes then you write the remainder, if no then start over. It's got a jazzy tune and we use hand motions as well.
For divide: hands in fists in front of you (to look like the division symbol)
For multiply: hands in an x
For subtract: hands out like a plane (again to look like the symbol)
bring it down: grab at the ceiling and bring it down to your waist
Look around: hand over eyes, look back and forth
Are you at the end: shrug

I find that this really involves them in the method and they'll often hum the tune while doing a problem, it allows children a fun way to remember and still work at their own pace.

Hope that helps, good luck.

 JoSo Joined: Apr 2010 Posts: 122 Full Member
JoSo

Joined: Apr 2010
Posts: 122
Full Member
Student generated Algorithms
04-20-2010, 07:41 AM
 #5

Since you have a gifted class, it might be interested to show your principal how your students can generate their own algorithms and explain their thinking involved. Many times they would be able to create t he cummutive and associative properties in division and multiplication. You can do this through contextual problems and have the students show their strategies and talk as real mathemticians. Who says that we have to only teach division through long division. Just a thought.

 roundstanley Joined: Oct 2009 Posts: 120 Full Member
roundstanley

Joined: Oct 2009
Posts: 120
Full Member
An odd but fun lesson
04-21-2010, 07:24 AM
 #6

Here is a fun activity that might not be good for your observation, but it might be good for another time.

http://teachershare.scholastic.com/resources/10450

 MrsBaldwin Joined: Jul 2009 Posts: 37 Junior Member
MrsBaldwin

Joined: Jul 2009
Posts: 37
Junior Member

04-22-2010, 01:41 PM
 #7

Awesome!! Thanks so much!! You all have taken much of the anxiety out of this with your great ideas!

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