Math

8th Grade

Revised Standards (2001)

Facts        (I)

1.8.1

Read, write, add, subtract, multiply, and divide real numbers in various forms including radicals, exponential, and scientific notation; convert a standard number to scientific notation and vice versa.

 

Application             (E)

1.8.2        

Compute with rational and irrational numbers to solve a variety of problems including rates, recipes, unit cost, and percents (e.g., discounts, interest, sale price, commissions, taxes).

 

Word Problems and Number Theory (I)            

1.8.3

Explain and apply concepts of number theory and properties of real numbers to solve problems.

 

Comparison and Ordering 

1.8.6

Compare and order rational numbers.

                   

Estimation and Rounding  

1.8.7                           (E)

Estimate in problem-solving situations and in practical applications; determine the reasonableness of the answer and verify the results.

 

Fractions                 (E)

1.8.9

Explain the relationship between fractions, decimals, and percents and translate among various representations of equal numbers (e.g., from fractions to decimals to percents, various forms of ³1² such as 3/3 or 16/16) to solve problems efficiently.

 

Patterns                    (E)

2.8.1

Use inductive reasoning to find the missing term in number and geometric patterns and to generalize basic patterns to the nth term, with and without calculators; use written, oral, and symbolic language to identify and describe patterns, sequences, and functions.

 

Relationships        

2.8.2

Translate among verbal descriptions and graphic, tabular, and algebraic representations of mathematical situations.

 

 

 

 

Variables (unknowns) (E)   

2.8.3

Identify, model, describe, and evaluate relationships, including functions, using a variety of methods with and without technology.

2.8.3a   Calculate an unknown quantity given a formula and the other quantities.

 

Number sentences and Equations  (I)

2.8.4                          

Add and subtract binomials describing the connection between the algebraic process and the arithmetic process.

 

Algebraic Basics   (I)

2.8.5

Describe how a change in one variable of a mathematical relationship affects the remaining variables using various tools and methods.

 

Linear Equations (E)

2.8.6

Model, identify, and solve linear equations and inequalities, using formal and informal methods, and relate this process to the order of operations.

 

Equation solutions (I)         

2.8.7

Solve simple linear equations and connect that process to the order of operations.

 

Comparison and Ordering 

3.8.1                    (E)

Solve problems which require comparison and conversion of units of measure for length, weight/mass, and volume within the same measurement system (customary and metric); estimate conversions between like units of the two systems to solve problems.

 

Measurement          (I)

3.8.2

Demonstrate an understanding of precision, error and tolerance in measurement using the appropriate measurement tool to the required degree of accuracy.

 

Estimation              (E)

3.8.3

Select and apply appropriate formulas to solve problems; identify the relationship between changes in area and volume and changes in linear measures of figures.

 

Proportion and Ratio  (E)   

3.8.5

Apply ratios and proportions to calculate rates and as a method of indirect measure (e.g., miles per hour, cost per unit).

 

Two-dimensional shapes (I)                

4.8.1

Construct regular and irregular polygons such as triangles, quadrilaterals, pentagons, hexagons, and octagons.

 

Congruence, similarity, and transformations  (E)

4.8.2

Apply the properties of equality and proportionality to solve problems involving congruent or similar shapes (e.g., create scale drawings, perspective drawings).

 

Coordinate geometry and line of symmetry      (W)

4.8.3

Use coordinate geometry and models to change scale (enlarge and reduce).

 

Line slopes and linear equations  (I)

4.8.5                          

Use coordinate geometry to represent and interpret relationships defined by equations and formulas (including distance, midpoint, and slope) with and without technology.

 

4.8.5a   Apply coordinate geometry skills to real world situations such as map grids.

 

Lines, angles, and geometric figures (I)

4.8.6

Form generalizations and validate conclusions about properties of geometric shapes including parallel lines,  perpendicular lines, bisectors, triangles, and quadrilaterals.

 

Pythagorean Theorem (I)   

4.8.7

Verify and explain the Pythagorean Theorem with various methods (e.g., using grid paper, applying it to a missing side of a right triangle); determine missing sides and angles of triangles based on properties of their sides and angles.

 

Draw and construct (W)      

4.8.8

Use hand tools, technology, and models to construct figures and bisect angles and line segments; distinguish among constructions, sketches and drawings.

 

 

 

 

 

Data collection and organization  (E)

5.8.1                          

Organize, display, read, and analyze data with and without technology using a variety of displays including  box and whisker plots.

 

Probability             (I)

5.8.2

Find the theoretical probability of an event using different counting methods (e.g., tree diagrams, sample spaces, and organized lists) and compare those results with actual (experimental) results, differentiating between the probability of an event and the odds of an event.

5.8.2a   Identify the uses of probability in the real world.

 

Probability analysis  (I)     

5.8.3

Solve real-life problems by finding the number of combinations possible in given situations using a variety of counting methods.

 

Data analysis         (E)

5.8.5

Evaluate arguments that are based on data analysis for accuracy and validity; analyze the effect a change of scale or a change of format will have on statistical charts and graphs.

 

Design     (I)

5.8.6

Formulate accurate inferences and projections based on interpolations (filling in) and extrapolations (extending) of data to solve problems.

 

 

 

 

8th Grade Process Standards

Problem solving         (E)

6.1

Select modify, develop, and apply strategies to solve a variety of mathematical and practical problems and to investigate and understand mathematical concepts.

 

6.2             (E)

Apply previous experience and knowledge to new problem-solving situations.

 

6.3             (E)

Formulate own problems; use various approaches to investigate and solve problems.

 

6.4             (E)

Explain and verify results with respect to the original problem.

 

6.5             (E)

Verify, interpret, and evaluate results with respect to the original problem situation, determining an efficient strategy for the given situation.

 

6.6             (E)

Try more than one strategy when the first strategy proves to be unproductive.

 

6.7             (E)

Apply multi-step, integrated, mathematical problem-solving strategies, persisting until a solution is found or until it is clear that no solution exists.

 

6.8             (E)

Apply solutions and strategies from earlier problems to new problem situations.

 

6.9             (E)

Generalize solutions and strategies from earlier problems to new problem situations.

 

6.10           (E)

Interpret and solve a variety of mathematical problems by paraphrasing, identifying necessary and extraneous information, selecting and justifying efficient methods and/or strategies, and ensuring the answer is reasonable.

 

6.11           (E)

Apply combinations of proven strategies and previous knowledge to solve non-routine problems.

 

6.12           (I)

Use technology, including calculators and/or computers to understand quantitative relationships, e.g., for skip counting and pattern exploration.

 

 

 

6.13           (E)

Use technology , including calculators and/or computers to solve problems and verify solutions.

 

6.14           (E)

Use technology, including calculators and/or computers, to investigate, define, and describe quantitative relationships such as patterns and functions.

 

Mathematical communication

7.1             (E)

Discuss and exchange ideas about mathematics as a part of learning.

 

7.2             (E)

Use inquiry techniques (e.g. discussion, questioning, research, data gathering, reading, writing, and active listening) to solve and develop understanding of mathematical problems.

 

7.3             (I)

Read expository text to learn about mathematics.

 

7.4             (E)

Use pictorial representations to identify mathematical operations and concepts.

 

7.5             (I)

Identify and translate key words and phrases that imply mathematical operations.

 

7.6             (E)

Interpret and solve word problems without the necessity of key words or phrases.

 

7.7             (E)

Use physical materials, models, discussions, pictures, or writing to represent and communicate mathematical ideas.

 

7.8             (E)

Use physical material, diagrams, and tables to represent and then communicate mathematical ideas through oral, verbal, and written formats.

 

7.9             (E)

Model and explain mathematical relationships using manipulatives, oral, written, pictorial, graphical, and algebraic methods.

 

7.10           (W)

Evaluate the effectiveness of written and oral presentation of mathematics.

 

7.11           (I)

Make conjectures and present arguments in discussions of mathematical ideas.

 

 

 

7.12           (I)

Explain and justify thinking about mathematical ideas and solutions.

 

7.13           (E)

Explain and evaluate thinking about mathematical ideas and solutions; discuss the validity of simple arguments.

 

7.14           (I)

Explain and evaluate thinking about mathematical ideas and solutions based on the role of definitions, properties, common rules, and symbols in solving problems.

 

7.15           (E)

Use everyday language to explain thinking about strategies and solutions to mathematical problems.

 

7.16           (E)            

Express mathematical ideas and use them to define, compare, and solve problems orally and in writing.

 

7.17           (E)

Use mathematical notation to communicate and explain mathematical situations.

 

 

Mathematical reasoning

8.1             (I)

Justify and explain the solutions to problems using manipulative and physical models.

 

8.2             (E)

Justify answers and the steps taken to solve problems with and without manipulative and physical models.

 

8.3             (I)
Construct, justify, and defend mathematical conclusions using logical arguments, in situations related to mathematics, science, and technology.

 

8.4             (E)

Use patterns and relationships to analyze mathematical situations; draw logical conclusions about mathematical problems.

 

8.5             (E)

Follow a logical argument and judge its validity.

Follow a logical argument and judge its validity, including the use of if-then statements (syllogisms) and the connectors ³and² and ³or².

 

8.6            

Apply deductive and inductive reasoning in mathematical situations to extend logical reasoning.

 

 

8.7

Recognize and apply deductive and inductive reasoning in both concrete and abstract contexts.

 

8.8             (E)

Ask questions to reflect on, clarify, and extend thinking.

 

 

8.9             (I)

Review and refine the assumption and steps used to drive conclusions in mathematical arguments.

 

8.10                             (I)

Construct valid arguments; make and test and defend conjectures about algebraic and geometric properties based on mathematical principles.

 

8.11           (E)

Determine relevant, irrelevant, and/or sufficient information to solve mathematical problems, including consumer problems.

 

Mathematical connections

9.1             (E)

Link new concepts to prior knowledge.

 

9.2             (E)

Use mathematical ideas from one area of mathematics to explain an idea from another area of mathematics.

 

9.3             (E)

Use models to explain the relationship of concepts to procedures as they apply to problems in real life.

 

9.4             (I)

Use the connections among mathematical topics to develop multiple approaches to problems.

 

9.5             (I)

Identify practical applications of mathematical principles that can be applied to other disciplines.

 

9.6             (I)

Use and analyze the connections between mathematics and other disciplines.

 

9.7             (E)

Apply mathematical thinking and modeling to solve problems that arise in other disciplines (e.g. rhythm in music and motion in science).

 

9.8             (E)

Identify, explain, and use mathematics in everyday life.

 

9.9            

Recall and accurately record numerical, alphabetical, symbolic and factual sequential data transmitted either verbally or in writing.

 

Return to Math Page