Grade 8 In the Area of: Estimation & Computation |
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| Use computation, estimation and proportions to solve problems. | - Set goals and parameters for scale project. - Generate rubric with class. |
- Design, complete a scaling project. Ex: art or astronomy application. Relate to real world application. | Explain how Sarah doesn't need to recompute. Her calculator
display was 676.8 after she multiplied 9.4 X 7.2, she forgot to key the decimal point. How
can estimation help her?
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- GEMS: Astronomy. - Project Earth Science. - GEMS: Earth, Moon & Stars. |
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Grade 8 In the Area of: Estimation & Computation |
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| - Estimate the square root of a given
number or the square of a number to the nearest range of whole numbers. - Estimate the square of a number.
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- Use a table of perfect squares (100 - 400) to model
estimation of a square number. - Reserve the process for estimating roots.
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Answer questions asking for estimate. Ex: Between what 2 numbers is the square root of 40? Estimate and then check with calculator. | Student explains difference between exact and approximate
square roots.
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- What is the value of 6 to the tenth power? 1,000th power?
How did you figure? - Research historical connection.
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- Math text. - Calculator. |
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Grade 8 In the Area of: Estimation & Computation |
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| Apply estimating to fractions, decimals & percents. | Sets up problem situation. Rookie teacher has no calculator as grading guide. Needs to have percents for students' grades - estimate. |
total points |
Student performs timed exercises from Developing Skills in
Estimation ( no calculators)
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You have a job. Starting salary was $3/hour. If you were
given a raise of 25 cents an hour, what would your rate of pay be after 8 hours? A week?
40 hours? A month?
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- Developing Skills in Estimation - Dale Seymour - Teacher-made worksheet. |
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Grade 8 In the Area of: Estimation & Computation |
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| Estimate to select most appropriate solution given more than one solution. | - Find samples of math problems in multiple-choice format. - Create task cards for small group work.
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Work in small group to discuss problems, share reasoning.
Choose best answer by estimating. Absolutely no pencil or paper or calculator allowed.
Share strategies with whole class.
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Student performs timed exercises from Developing Skills in Estimation (no calculators). | Puzzle: In a university there are 6 times as many students as
there are professors. Which of the following equations correctly expresses the
relationship.
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- Multiply Choice math problems (Outdated standardized
tests are 1 source). - Favorite Problems - Dale Seymour. |
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