The Distributive Property using Geometers Sketchpad

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The Distributive Propertyusing Geometers
Sketchpad

• Or
• What I did on my Summer Vacation.

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GEOMETERS SKETCHPADPLANNING A LESSON   Topic
The math topic I am addressing is the
Distributive Property of Multiplication over
Addition.   Reasons I chose this topic and these
virtual manipulative because my students have
difficulty understanding this concept. Also,
since I teach multiple levels of Math and the
Distributive Property occurs in many situations I
felt this lesson would be relevant for most of my
students.   Learning Objectives Learning
Objectives q       To demonstrate the
distributive property through numbers,
manipulatives and variables q       To use the
distributive property in a variety of situations
q       To use real-life situations to expand
thinking from concrete to abstract reasoning To
answer test questions involving the distributive
property (MCAS, SAT
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Levels of Vocabulary Knowledge (Modified)    
Level 1 I never heard it before       Level
2 I heard it before but I am not sure what it
means     Level 3 I know what the word means in
at least one situation     Level 4 I know
multiple meanings of the word and/or meaning of
the word in specific situations (Hardware
store, computer)
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What is the meaning of Distribute?

• To pass out , as in worksheets
• Math Definition

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What is Property?

• Something that belongs to someone.

• Math Definition

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(No Transcript)
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When do you use the Distributive Property in Math?
Madison Park was painted during the summer.One
hallway had three sections.The height of each
section was 15 feet. The length of of the three
section is 11 feet, 16 feet and 14 feet,
respectively.
What is the total area of the hallway sections?
Solve the problems using two methods. Use the
construction paper to model the problem.
Discussion QuestionsWhat do you noticed about
the answers? Which method do you prefer? Why?
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Direction for A Painting Dilemma

• Open Exploring Algebra CD
• Open Sketches
• Open 3 Algebraic Expressions
• Open Distributive Property
• Open A Painting dilemma m

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Class assignment

• After you have opened A Painting Dilemma
  follow the directions on your worksheet p.99-100.
• Using different measurements write the
  dimensions,Caris solution and Zeebas solution
  on your A Painting Dilemma handout. You can
  work in teams.

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A Painting Dilemma
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Exploring Algebra Geometer SketchpadA Painting
Dilemma
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Independent Activity

• Write an example of situation when you could use
  the distribute property in real life
• Try to represent this situation in the following
  ways
• N Numerical
• A-Algebraic
• G-Graphic