# Archive for December, 2012

## Russian Peasant Method of Doubling and Halving

Here is another strategy for multiplying double digit numbers .It is a method that you would teach at the abstract level. It uses the strategy of Doubling/Halving. It is often called the Russian Peasant Method. Here are some video examples.

Video 3

Video 4

Happy Mathing,

Dr. Nicki

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## Multiplicative Comparison Problems

Multiplicative Comparison type problems are explored in 4th and 5th grade. Here are some great resources explaining these problem types. There are several different types within the multiplicative comparison genre. Remember that the research says that it is important for students to understand the type of problem they are solving rather than “key words.”

Resource 1 (Be sure to look at all the related resources at the bottom of the page)

Resource 5 – Math Video

Resource 6 – Math Video

Resource 7 – Math Video

Multiplicative Comparison Video!

Happy Mathing,

Dr. Nicki

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## Overview of Progression in Division

I love this concept of a Passport to Division 1! Other resources to help on the journey through the land of division!

Resource 3 (I like the way they break the concepts down)

Happy Mathing,

Dr. Nicki

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## Ideas about the Multiplication Progression

I love this idea of a Passport to Multiplication 1 & Passport to Multiplication 2! It’s brilliant! Play with it and come up with something that works for your students! Here are some other great resources that talk about the journey through this land.

Another great Resource .

Happy Mathing,

Dr. Nicki

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## Thinking More about Addition and Subtraction

Here are some great examples! What type of communication do you send home to your parents about the new common core? Has your school made a parent handbook to explain the new algorithms and strategies?

Happy Mathing,

Dr. Nicki

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## Decimal of the Day

Decimal of the day is another routine that gives students an opportunity to revisit concepts throughout the year. In a decimal of the day routine the teacher writes a decimal like .55 and then the students do a series of activities with that decimal as well as answer some questions about it. For example:

1. Write the decimal in word form

2. Write it in fraction form

3. Write 2 decimals that are great than this number (Show them all on the numberline)

4. Write 2 decimals that are less than this number (Show them all on the numberline)

5. Write the decimal in expanded form

6. Add .9 to this decimal

7. Subtract .9 from this decimal

8. Multiply 2 by this decimal; Write a story about this equation

9. Round it to the nearest tenth and hundreth

10. Compare it with symbols to 2 other decimals

Resources:

Happy Mathing,

Dr. Nicki

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## Fraction of the Day: Guided Math and Math Center Activities

Fraction of the day is a great routine. Jennifer Findley did a great graphic organizer! I have extended the concepts based on the math CCSS. To do this routine, you take a fraction like 3/4 and you have the students do some or all of the following:

1. Decide if it is in simplest form

2. Add 1/4; Draw a model

3. Subtract 1/4; Draw a model

4. Add 1/2 (You want students to realize that this is easy…just decompose 1/2 into fourths); Draw a model

5. Subtract 1/2 (see above); Draw a model

6. Multiply it by 3/ Write a story to go with your equation

7. Compose/Decompose it …like 3/4 = 1/4 +1/4 + 1/4 or 3/4 = 1/2 +1/4

8. Divide 3 by it / Write a story to go with your equation

9. Draw it on a Numberline….Is it closer to 0, 1/2 or 1

10. Draw it as a set and/or as the area model

Happy Mathing,

Dr. Nicki

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## Ways to think about subtraction!

Subtraction is much more difficult for children than addition. We don’t tend to teach enough subtraction strategies and have students play around with them in small guided math groups and math centers. Here are some ideas to add to your thinking about teaching subtraction.

Resource 2 (Be sure to scroll down to the illustrated examples!)

Where are your students along this learning continuum? What do you need to teach next?

Happy Mathing,

Dr. Nicki

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## Teaching Subtraction

Here is a fantastic resource for teaching basic subtraction!

Also, be sure to look at my PINTEREST Subtraction Board.

Happy Mathing,

Dr. Nicki

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