Welcome to our Math Brown Bag Lunch Mrs' Burg

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Welcome to ourMath Brown Bag LunchMrs. Burg
Ms. CapperDecember 2008
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How would you solve
300
- 199
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Possible Strategies

• Regrouping
• Adding onto the smaller number
• Using place value
• Using negative numbers
• Building the number with manipulatives

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What is CGI?

• Cognitively Guided Instruction is a teacher
  professional development program that helps
  teachers understand how children think about
  mathematics.

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CGI in Iowa

• The Iowa Department of Education has supported a
  state-wide CGI initiative since June 2005.
• There are currently 18 Iowa-based CGI leaders who
  have been trained through this initiative.
• Over 400 teachers and teacher leaders in Iowa
  have participated in this initiative.

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In Our CGI Classroom

• We pose problems to the children without first
  showing them how to solve the problem.
• Children solve problems using their own
  strategies.

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In Our CGI Classroom

• Children share their mathematical thinking with
  the teacher and with other children.
• We observe and listen to the children as they
  solve problems to assess individual childrens
  mathematical understanding.

I noticed
I discovered
I observed
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In Our CGI Classroom

• We use information about childrens mathematical
  understanding to plan instructional moves and to
  choose further problems.
• We look for conceptual understanding.

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In Our CGI Classroom

• We question students to stretch their strategies
  and move them to a higher level of thinking.
• We ask students to look for and implement
  efficient strategies.

What strategy did you use to solve this problem?
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Research has found in CGI classrooms

• Students in CGI classrooms spend more time
  engaged in problem solving than students in
  non-CGI classrooms.
• Students in CGI classrooms spend more time
  talking about their mathematical ideas than
  students in non-CGI classrooms.

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Problem Based Tasks

• A real life problem is presented to the group.
• Students use a variety of problem solving
  strategies to find the solution.
• The investigation of a problem can extend for
  two, three, or more days.

Lets use a range of numbers, since we have a
lot of people.
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Problem Based Tasks

• Numerous math strands are incorporated throughout
  the problem.
• Students apply concepts and skills gained from
  discussion and word problems.
• Summarizing is an important component. It is
  valuable for students to reflect on their
  learning, hear from others and connect to others
  ideas.
• About Teaching Mathematics
• Marilyn Burns

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How can we solve this problem?

• Our bubble spots are too close together
  therefore causing distractions. What can we do?
• Make a map of our space to arrange new spots!

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How can you help at home?

• Ask your child to explain his or her thinking.
• Listen to and question them about their strategy.
• Pose real life problems (grocery store, gas
  station, store receipts, etc.)
• Play mental math games.
• Encourage the use of friendly numbers, relational
  thinking, and efficient strategies.

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• Thank you for attending our Brown Bag Lunch!