Parent Math Night Tuesday, January 15, 2008 Chapel Hill Elementary
WELCOME
$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? Old Math vs. New Math
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.
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?
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
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
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
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
Fourth Grade • Further develop meaning of decimals and use them in computation and problem solving
Fifth Grade • Further understand multiplication of whole numbers • Understand and investigate algebraic mathematical expressions
How Parents Can Help • Be positive! • Communicate with your child! • Have high expectations!
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.
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.
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?
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.
Plan 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 planallotment. 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.
Execute 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 planallotment. 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
Survey 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 planallotment. 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.
REMEMBER • Be positive! • Communicate with your child! • Have high expectations!
