Long Division Lesson

Long Division Lesson

By Katie Grahlfs
EdTech 521
email: katiegrahlfs@u.boisetate.edu

Objectives:

• By the end of this lesson, you will be able to accurately describe the steps for long division: Divide, multiply, subtract and bring down. 
• By the end of the lesson, you will be able to accurately apply the strategies of DMSB to long division problems and get a correct answer with 80% accuracy.  
• By the end of the lesson you will be able to describe how to follow the process of long division and accurately walk a beginner through a long division problem using vocaroo.

Step 1: What is Division?

Today you are going to be learning all about long division! Before going any farther, make sure to watch the video on the process of long division. 


This is a video of How to do Long Division. Click on the first video in the sidebar to  view.

Step 2: Remainders…What are They?

A remainder is anything left over when you are dividing.

For example:

Let’s say there are 2 students outside at recess playing cards. They need to share the cards evenly. There are 13 cards.

If we start distributing cards to each student, we will find that once we get to 12 cards, we now have 1 card leftover. Neither student can have the card because then the 2 groups will not be equal. Division is always fair, so the groups HAVE to be equal.

Therefore the answer to 13 ÷2 = 6 r1

That means that each kid gets 6 cards and there is one left over.

The little r stands for remainder. There is one card remaining outside of a group. Click on the second video in the sidebar to learn more about remainders. 

Step 3: Rock it Out! 

Now that you have had some instructions on the process of long division, go to this site to see a fun video about the four steps of long division.  

1)   Divide

2)   Multiply

3)   Subtract

4)   Bring Down

I love the YMCA! (look for the closed caption button if you need more help in YouTube)

(Bonus points for making your own song/video for the steps of long division. Email me if you are interested)

Step 4: Snork’s Division Game

Alright, now I think you are ready for some serious practice! Check out Snork and his long division game! Make sure to play a couple rounds as you think about the process of Divide, multiply, subtract, and bring down!  (Make sure to keep the divisor at 9)

Step 5: A Little More Practice

Ok, just a little more practice because your quiz is coming up!

Step 6: Quiz Time

Go to this sheet  and print out the worksheet. Solve the problems with a pencil and paper using D,M,S,B. Scan the paper back into your computer and email it to me as your assignment. This is the best way for me to see if you understand the process of long division.

Good luck. Make sure to show your work; otherwise I won’t know if you or a calculator solved the problem!

If you need to rewrite the problems on a separate piece of paper because you don’t have enough room, just scan that in as well.

Modifications: If you struggle to write the problems with a pencil and paper, please let me know and we can make other arrangements, such as describing the process and your answers to me orally or by typing in the answers to the google sheet as long as all the steps are visible. 

You also need to go to http://quizstar.4teachers.org/indexs.jsp to take a quiz online. Login as a student with the username ps14 and password boisestate to take the quiz! 

Step 7: Explain it to Me!

Using http://vocaroo.com/, explain the steps of long division. I will be listening for the four steps and for an example problem, like 100 ÷ 5, And then an explanation of how to solve the problem, step by step. If you need an example, go back to the PowerPoint in step 1.  Share your finished product in the discussion forum.

Rubric

Category	4	3	2	1
Steps for Long division are explained	All four steps included with thorough descriptions of each	All four steps are included but not explained in details	A step or two is missing with very little explanation	More than two steps are missing with little to no explanation
Tone of Voice	Student speaks clearly and all words can easily be understood	Students speaks clearly most of the time and very little is misunderstood	Student speaks somewhat clearly, but some of the presentation cannot be understood	Student does not speak clearly most of the time
Example problem	Example is provided and is explained accurately with zero mistakes and all steps are covered in the problem	Example is provided and all steps are explained in some detail but 1-3 mistakes are made	Example is provided but not easily understood and student makes 3-5 errors, the steps are not clear in the presentation	Student does not provide an example at all
Grammar	Student uses correct grammar with no mistakes	Student makes 1-3 mistakes	Student makes 3-5 mistakes	Student makes more than 5 grammatical errors
Discussion Forum	Student posts and comments on at least 2 other students entries	Student posts their entry and comments on at least one other entry	Student posts their entry but does not comment on other entries	Student does not post or comment

Total=    /20 points

Modifications: If you are unable to use vocaroo or struggle to get your ideas out in an organized fashion, please let me know and we can make arraignments for a PowerPoint or Word document to be submitted instead.