Long Division Lesson
By Katie Grahlfs
EdTech 521
email: katiegrahlfs@u.boisetate.edu
Objectives:
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.
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
(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
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!
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.
