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Parent Math Night

Tuesday, January 15, 2008

Chapel Hill Elementary

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WELCOME

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Old Math vs. New Math

$8.25 x 8 = Ella earns $8.25 per hour and 1 ½ times this amount when she works over 8 hours in a day.

About how much did Ella earn if she

worked 10 ¾ hours last Wednesday?

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What’s the difference?

The focus of GPS math is for students to have a deeper understanding of math concepts

and be able to apply newly learned knowledge to real world situations.

Emphasis is on problem-solving, reasoning, representation, connections, and

communication.

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A New Problem

Abigail's cell phone company determines the price she is charged each month by using the expression

59.99 + 0.45n when n represents the number of day-time minutes over her plan allotment.  If her

plan allotment is 450 day-time minutes per month, use the expression to determine what the cell

phone company charged her if she talked 734 day-time minutes last month?

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Kindergarten

• Understand concept of money by making fair trades with coins

• Understand concept of time by experiencing a daily schedule

• Understand concept of ones and tens

• Begin solving problems

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First Grade

• Develop understanding of the measurement of time

• Add or subtract smaller numbers with ease

• Understand addition and subtraction number combinations using strategies such as counting on, doubles, and making tens

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Second Grade

• Understand place value to three digit

• Use correct decimal notation and symbols

• Solves three-digit addition and subtraction problems with regrouping

• Use simple concepts of multiplication

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Third Grade

• Develop skills of addition and subtraction with decimals and use in problem solving

• Expand knowledge of multiplication and use in problem solving

• Represent unknowns in mathematical sentences using symbols

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Fourth Grade

• Further develop meaning of decimals and use them in computation and problem solving

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Fifth Grade

• Further understand multiplication of whole numbers

• Understand and investigate algebraic mathematical expressions

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How Parents Can Help

• Be positive!

• Communicate with your child!

• Have high expectations!

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Math homework due tomorrow. How can I help?

• If you are unsure about math, don’t panic.• If you are good at math, don’t take over.• Questions to ask:

– What is the problem you’re working on?

– What words or directions don’t you understand?

– What do you already know that can help you work through the problem?

– Let’s try drawing a picture or making a diagram.

– Tell me where you’re stuck.

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Use ROPES• Read

– Did I read the problem thoroughly?• Omit

– Cross out unneeded information.• Plan

– What strategies can I use?– What operation will I use?

• Execute– Carry out your plan.– Find the answer.

• Survey– Does it make sense?– Explain.

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Read

Abigail's cell phone company determines the price she is charged each month by using the expression

59.99 + 0.45n when n represents the number of day-time minutes over her plan allotment.  If her

plan allotment is 450 day-time minutes per month, use the expression to determine what the cell

phone company charged her if she talked 734 day-time minutes last month?

• Did I read the problem thoroughly?

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Omit

Abigail's cell phone company determines the price she is charged each month by using the expression

59.99 + 0.45n when n represents the number of day-time minutes over her plan allotment.  If her

plan allotment is 450 day-time minutes per month, use the expression to determine what the cell

phone company charged her if she talked 734 day-time minutes last month?

• Cross out unneeded information.

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PlanAbigail's cell phone company determines the price she is charged each month by using the expression 59.99 + 0.45n

when n represents the number of day-time minutes over her plan allotment.  If her plan allotment is 450 day-time minutes per month, use the expression to determine what

the cell phone company charged her if she talked 734 day-time minutes last month?

• What strategies can I use?• What operation will I use?• I have to subtract to find out how many minutes Abigail

went over.• I have to multiply to find out how much she will be

charged for the amount of minutes that she was over.• I have to add the overage amount to the cost of her plan.

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ExecuteAbigail's cell phone company determines the price she is charged each month by using the expression 59.99 + 0.45n

when n represents the number of day-time minutes over her plan allotment.  If her plan allotment is 450 day-time minutes per month, use the expression to determine what

the cell phone company charged her if she talked 734 day-time minutes last month?

• Carry out the plan and find the answer.

Subtract Multiply Add

734 284 127.80

-450 x .45 + 59.99

284 1420 $187.79

+ 1136

127.80

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SurveyAbigail's cell phone company determines the price she is charged each month by using the expression 59.99 + 0.45n

when n represents the number of day-time minutes over her plan allotment.  If her plan allotment is 450 day-time minutes per month, use the expression to determine what

the cell phone company charged her if she talked 734 day-time minutes last month?

• Does it make sense? Explain.

• I came up with $187.79.

• If I go back and subtract 59.99 from 187.79, I get 127.80.

• If I divide 127.80 by .45, I get 284.

• If I add 284 to 450, I get 734.

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REMEMBER

• Be positive!

• Communicate with your child!

• Have high expectations!