Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Curricula » Investigations for 4 and 5

Topic: Number Sense and Computational Fluency
Replies: 92   Last Post: Jul 24, 2008 5:09 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Sam Morris

Posts: 35
Registered: 12/3/04
Re: Re: Teaching Algorithms
Posted: Dec 5, 2000 5:23 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

I haven't found the best or right way to teach the mult. algorithm yet
either, but I have seen and used a neat visual model with fourth
graders that has helped some of them understand the steps of the
procedure. This is very complicated for me to explain, but once you
see it it seems pretty straight forward using Base 10 blocks (having
several colors is a big help here, by the way. Let's sasy we're doing
31 X 45. We start by placing 3 tens and one on together lengthwise as
if building the top row of a 31 X 45 array. Then We place 3 more tens
and 5 ones under the first 10 making the side of a 31 X 45 array.
Then fill in the array with tens and ones. If you have four colors
available you can make the 30 X 40 section one color, the 1 X 40
section another color, the 30 X 5 section a third color, and the 1 X 5
section a fourth color. then the students can count up what's in
there. At the beginning they may count the tens then count on the
ones. AS they get better at it they may bagin to trade for hundreds
and tens. In any case, this model shows the four numbers that need to
get multiplied together to get the final answer and shows the relative
values of the numbers in each "section". I have students who's
parents showed them the algorithm and insist that they use it. This
model, while not very efficient, especially at first, has helped some
of these kids understand what is going on in the algorithm, and now no
longer need to build the arrays to et the answer and can explain how
the algorithm works. I know this sounds confusing, but it's hard for
me to describe it. Seeing it, however, is very convincing.

Sam




Date Subject Author
11/23/98
Read Number Sense and Computational Fluency
wendy
2/3/99
Read Computation skills for middle school
concerned teacher
2/12/99
Read re: computation skills
Nancy B.
3/4/99
Read computation skills practice
Mary Brown
3/28/99
Read re: computation skills practice
Missy Taft
3/28/99
Read more computation skills practice
Barbara
4/2/99
Read computation skills: engaging parents
Missy Taft
4/3/99
Read re: computation skills and parents
Mary Brown
4/9/99
Read computation skills
Cornelia Tierney
4/25/99
Read Re: computation skills practice
Mary Beth LaHaye
5/28/99
Read Re: computation skills practice
Rachelle Tome
5/28/99
Read facts practice
Rachelle Tome
10/9/03
Read Re: re: computation skills
Patty
5/9/99
Read Re: Computation skills for middle school
Mary Beth LaHaye
7/24/08
Read Re: Computation skills for middle school
Pukar
4/14/99
Read Number Sense in Close to 100
Meghan Anderson
4/17/99
Read Computational Strategies
Cindy Stogsdill
5/21/08
Read Re: Computational Strategies
Emma1
4/21/99
Read Number Sense through the games
Janice Odom
4/25/99
Read Improvements in number sense
Mary Beth LaHaye
10/27/99
Read Computational Materials
Gary Woodford
10/31/99
Read Re: Computational Materials
Sam Morris
10/31/99
Read Computation in the Investigations Program
Wayne Watson
11/22/99
Read Division difficulties
Rachelle Tome
11/29/99
Read Re: Division difficulties
Sam Morris
11/29/99
Read Division
Wayne Watson
12/6/99
Read Getting Started using Landmarks in the 1000s
Joan Schaffer
12/8/99
Read Re: Getting Started in Grade 5
Julie
12/11/99
Read Re: Getting Started
Sam Morris
2/27/00
Read Action Research-New Strategies for Struggling Students
Missy Taft
3/3/00
Read Re: Action Research-New Strategies for Struggling Students
Sam Morris
3/6/00
Read Re: Re: Action Research-New Strategies for Struggling Students
Missy Taft
3/12/00
Read Re: Re: Re: Action Research-New Strategies for Struggling Students
Sam Morris
3/6/00
Read Division: Packages and Groups
Joan Schaffer
3/12/00
Read Re: Division
Sam Morris
3/13/00
Read Re: Division
Wendy Gulley
3/13/00
Read Division
Joan Schaffer
3/13/00
Read Choosing units
Wendy Gulley
3/9/01
Read Re: Re: Division
mary jane giardi
3/10/01
Read Re: Division
Cynthia Garland-Dore
3/17/00
Read Kumon Math
Gary Woodford
3/25/00
Read Re: Kumon Math
Sam Morris
3/30/00
Read Re: Kumon Math
Wendy Gulley
4/27/08
Read Re: Kumon Math
Megan
7/22/08
Read Re: Kumon Math
chitra
6/15/00
Read connections with fractions
Melissa Mohan
11/12/00
Read advanced computation
judy Berkowitz
11/19/00
Read Re: advanced computation
Sam Morris
11/19/00
Read Computational Strategies: a balance needed
Mike Swaine
11/27/00
Read Re: Computational Strategies
Jacki Riffey
11/27/00
Read Re: Re: Computational Strategies
Sam Morris
10/22/03
Read Re: Re: Computational Strategies
Patty
10/24/03
Read Re: Re: Re: Computational Strategies
Euthecia Hancewicz
11/27/00
Read Re: Computational Strategies
Sam Morris
11/28/00
Read Re: Re: Computational Strategies
Susan Weiss
11/28/00
Read Teaching Algorithms
Wayne
11/29/00
Read Re: Teaching Algorithms
Jacki Riffey
11/30/00
Read Re: Re: Teaching Algorithms
Susan Weiss
12/5/00
Read Re: Re: Teaching Algorithms
Sam Morris
12/7/00
Read Re: Re: Re: Teaching Algorithms
Rachelle Tome
12/4/00
Read Teaching Algorithms
Mike Swaine
12/12/00
Read Re: Teaching Algorithms
Wendy Gulley
2/8/01
Read multipling and dividing fractions
Sharon Peck
2/14/01
Read Re: multipling and dividing fractions
Cynthia Garland-Dore
4/29/01
Read Packages and Groups Book
LA Pruske
4/29/01
Read Re: Packages and Groups Book
Cynthia Garland-Dore
5/7/01
Read Re: Re: Packages and Groups Book
LA Pruske
5/8/01
Read Data investigation: Looking at Mystery Data
Melissa Mohan
7/5/01
Read mult/div fractions
Linda Dodge
12/11/01
Read whole number computational fluency articulated to decimal computation
Maize Micek
12/11/01
Read Re: whole number computational fluency articulated to decimal computation
Linda Dodge
7/5/02
Read Advice for teacher new to Investigations
Yolanda Farmer
7/5/02
Read Re: Advice for teacher new to Investigations
Jacki Riffey
7/5/02
Read Re: Re: Advice for teacher new to Investigations
Debra
7/6/02
Read Re: Re: Re: Advice for teacher new to Investigations
Wayne
7/11/02
Read Re: Advice for teacher new to Investigations
Paul Hickman
7/17/02
Read Re: Advice for teacher new to Investigations
Cynthia Garland-Dore
7/7/02
Read Small array/big array
Peg Dillman
10/8/02
Read My students hate TERC, help!
Rachel
10/18/02
Read Re: My students hate TERC, help!
Beth Perry
4/23/03
Read math learning and success rates
Hannah, interested student
4/23/03
Read Re: math learning and success rates
Debra
7/28/03
Read Re: math learning and success rates
Meggan Henerlau
7/28/03
Read Students hate TERC
Sarah Hogg
10/7/03
Read big array, small array
betsy
10/7/03
Read Re: big array, small array
Bob Nagle
10/8/03
Read Re: big array, small array
Nancy
10/9/03
Read big array, small array
betsy
10/19/03
Read Learn languages (free)
fred
4/27/08
Read Re: Number Sense and Computational Fluency
Megan
5/10/08
Read Re: Number Sense and Computational Fluency
Hema
7/22/08
Read Re: Number Sense and Computational Fluency
chitra
7/24/08
Read Re: Number Sense and Computational Fluency
Pukar

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.