Mathematics Curriculum Guide
Number Sense and Number Systems
Grade 7 In the Area of: Number Sense & Number Systems |
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| 1
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| Develop and describe the connections
between forms of numbers (whole, fractions, decimals, percents).
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Explain Parade of Triplets activity from AIMS. | Graphically determine the relationships between fractions,
decimals, and percents.
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Based on worksheet. | Tipping?! How can you compute 15%, 10% or 20% tip
other than by multiplying by .15, .1 or .2?
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AIMS July/August '96. | |
Grade 7 In the Area of: Number Sense & Number Systems
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| 2
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| Develop and use common decimal &
fraction equivalents between 0-1.
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Demonstrate how to change fractions to decimals and decimals
to fractions.
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Change fractions to decimals; decimals to fractions; memorize common equivalents. | Burger Jack's ads claim that their 1/2 lb. burger contains
50% more beef then Winnie's 1/3 lb. burger. Is this claim true? Defend your answer with
chart and manipulatives.
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Transition Math. | ||
Grade 7 In the Area of: Number Sense & Number Systems
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| 3
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| Demonstrate powers & scientific
notation as alternate ways of writing numbers with the assistance of calculators.
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Show how very large and very small can be written using positive and negative exponents and scientific notation. | Convert very large and very small numbers to decimals. | Students write examples of very large and very small members
and their relationships to "real" items.
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Exploring the size of One Millionth, p. 24 (see Resources). | - Transition Math. - NCTM Addenda Series: Developing Number Sense.
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Grade 7 In the Area of: Number Sense & Number Systems
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| 4
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| Identify, use scientific notation.
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Have students list planets in order of distance from sun in decimal and scientific notation. | Be able to give examples of very large and very small numbers such as real life statistics. | With calculator, determine when positive and negative integer
powers become small enough to appear in scientific notation.
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Give examples of scientific notation in real life situations. | Transition Math. | |
Grade 7 In the Area of: Number Sense & Number Systems
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| 5
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| Develop, apply theories of
primes, factors, multiples in real world and mathematical problem situations.
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Explain how to use Sieve of Eratosthenes; and how to use number boards and unifix cubes. | Find all primes between 1 and 100; use the 100 board to verify the fundamental theorem of arithmetic. | Summarize findings and patterns. | Find information on the Goldbach Conjecture to
present to class.
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Patterns and Functions, Addenda Series 5-8. | |
Grade 7 In the Area of: Number Sense & Number Systems
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| 6
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| Apply order of operations to evaluate
numerical expressions.
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- Present various activities and topics for discussion - How
is it Possible? What comes first? - Practice with parentheses.
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Demonstrate importance of order of operations; evaluate
expressions using order of operations.
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Evaluate expressions using order of operations. | Chart/skit mnemonic device to remember order of operations. | "Order of Operations," The Textbook Series in
Curriculum Center, p. 11 and following.
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Grade 7 In the Area of: Number Sense & Number Systems
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| 7
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| Explain and apply the Associative, Commutative, & Distributive Properties of Numbers. | Have students look up meanings of associate, commute and
distribute; discuss how meanings can be related to math.
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Relate everyday meanings of associate, commute and distribute
to math; recognize and apply properties.
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Student will name, define and illustrate each property. | Diagram/skit to show application of one of these properties.
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Grade 7 In the Area of: Number Sense & Number Systems
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| 8
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| Compare, develop square roots. | Have students write the squares of 0 - 20. Explain what is
meant by square root, using radical sign.
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List square roots of perfect squares up to 400; find square
roots using square root key on calculator.
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Write an explanation re: "What is a square root?"
Use manipulatives to illustrate.
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Write squares above 20. | ||
Grade 7 In the Area of: Number Sense & Number Systems
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| 9
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| Develop concepts of integers & rational numbers using concrete models (number lines, manipulatives, etc.) in the context of real world situations. | Draw number line on board. Explore with class numbers above zero - is there anything less than 0? etc. |
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Is the sum of 2 consecutive integers odd or even? Always? How
about the product of 2 consecutive integers? 3? Show your reasoning.
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- Number line. - Journals. |
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Grade 7 In the Area of: Number Sense & Number Systems
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| 10
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| Sort, describe simple interest. | Teacher models computing simple interest. Compares interest
rates of local financial institutions.
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Students follow stock in market; show rate of gain or loss. | Graph and explain the growth of population over time of a
colony that doubles once a day.
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- Newspapers. - Graph paper. |
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Grade 7 In the Area of: Number Sense & Number Systems
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| 11
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| Formulate strategies to use signed numbers in addition & subtraction situations. | Distribute disks and worksheets to students; explore concept of additive inverses - do worksheet, pp. 22, 23, 24 together. | Add and subtract integers using colored disks and worksheet, p. 25. | Correct completion of worksheet.
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- Two-colored disks. - Algebra for Everyone.
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Grade 7 In the Area of: Number Sense & Number Systems
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| 12
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| Recognize, calculate absolute value.
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Demonstrate absolute value as the distance from zero on a number line. | Solve expressions using absolute value.
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Students will explain absolute value in own words. | Transition Math.
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Grade 7 In the Area of: Number Sense & Number Systems |
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| 13
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| Formulate strategies to use signed
numbers in multiplication & division situations.
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Distribute disks and worksheets to class. Demonstrate how to multiply or divide integers. | Show how to multiply or divide integers using worksheets on pp. 24-28 and disks. | Worksheet on p. 29. | Focus on Pre-Algebra.
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Grade 7 In the Area of: Number Sense & Number Systems |
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| 14
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| Solve expressions, using order of operations on a calculator. | Distribute worksheet, Technology Corner, pp. Review
parentheses and exponents on a calculator.
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Solve expressions using order of operations on a scientific
calculator.
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Order of Operations, The Textbook Series, p. 35.
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Grade 7 In the Area of: Number Sense & Number Systems |
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| 15
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| Compare and develop operations with fractions & mixed numbers. | Distribute pattern blocks and worksheets. Demonstrate
activity with class.
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Demonstrate fraction relationships and operations using
pattern blocks.
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Write a paragraph to demonstrate
understanding of relationships and operations with fractions.
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Fractions With Pattern Blocks, Creative Publications. | ||
Grade 7 In the Area of: Number Sense & Number Systems |
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| 16
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| Use, interpret ratios &
proportions.
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Review scale drawings. Explain activity, Honey, I Shrunk
the Kids, p. 57.
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Analyze information on worksheet 21B, Honey, I Shrunk the
Kids.
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Use questions on worksheet - include explanations. | Use scale factors to create fractals.
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Measurement In the Middle Grades, Addenda Series 5 - 8. | |
Grade 7 In the Area of: Number Sense & Number Systems |
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| 17
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| Generate ordered pairs to graph linear equations. | Demonstrate how to make table of x y-values to produce ordered pairs for graphing linear equations. | Graph linear equations.
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Tables and graphs.
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Grade 7 In the Area of: Number Sense & Number Systems |
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| 18
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| Use, interpret decimals, percents, and fractions in estimating. | Give directions for activities 29, 31, 32, and 34 from, Developing
Number Sense.
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Verbalize reasoning in estimation. | Any of activities could be used to
evaluate student's estimation reasoning.
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-Use calculator to explain the effect of operations on
decimals. - The Maze, p. 41, Developing Number Sense. |
Developing Number Sense Addenda Series 5 - 8. | |
Return to Grade 7 Curriculum Preface
Return to Grade 7 Curriculum Guide
Return to Mathematics Curriculum Frameworks