Download - Parent Math Night
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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!