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1 | CCSS | LAUSD | Standard’s Exact Wording | Skills + Extra | Digital | |||

2 | Stand. | Unit | VOCABULARY words are underlined | Vocabulary | Description | Resource | Our Rating | Version in… |

3 | Know that there are numbers that are not rational, and approximate them by rational numbers | |||||||

4 | 8.NS.A.1 | 1 | Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats eventually, and convert a decimal expansion which repeats eventually into a rational number. | |||||

5 | Rational, irrational, decimal expansion | convert decimals to fractions | 1. http://www.illustrativemathematics.org/illustrations/335 | 1. not great, 3 problems | ||||

6 | identify irrational numbers | 2. http://www.illustrativemathematics.org/illustrations/334 | 2. 8 problems, identify if rational. OK. Probably can find better on Kuta | |||||

7 | 3. Glencoe Algebra text, p. 46-52, plus worksheets for Chapter 1-8. | |||||||

8 | Rational vs. Irrational MAPS task | 4. http://map.mathshell.org/materials/download.php?fileid=1245 | Individual pre-assessment, then group task and poster | |||||

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11 | 8.NS.A.2 | 1 | Use rational approximations of irrational numbers to compare the size of irrational numbers, locate them approximately on a number line diagram, and estimate the value of expressions (e.g., π2). For example, by truncating the decimal expansion of √2, show that √2 is between 1 and 2, then between 1.4 and 1.5, and explain how to continue on to get better approximations. | |||||

12 | Khan Acad Video on approximating sq. root of 45 | 1. https://www.khanacademy.org/math/arithmetic/exponents-radicals/radical-radicals/v/approximating-square-roots | 1. Good method, but he talks too fast for our kids. | |||||

13 | Lesson online teaching how to do it (above), then a great worksheet generator with answers to approx. square roots up to x digits: | 2. http://www.homeschoolmath.net/teaching/square-root-algorithm.php | 2. Both Excellent. Shows exactly how to find decimal approximations for irrational numbers. We can easily make worksheets for this. | |||||

14 | 3. From old text McDougal, PDF on Wiki page “CCSS Required Fluency” | http://www.homeschoolmath.net/worksheets/square-roots.php | 3. Good visual method for ELs. | |||||

15 | 4. http://www.illustrativemathematics.org/illustrations/336 | 4. very good, compares radicals, exponents, pi | ||||||

16 | put 4 irrational numbers on a number line. | 5. http://www.illustrativemathematics.org/illustrations/337 | 5. Good, but need more practice over time | |||||

17 | placing a square root on a number line to one decimal point | 6. http://www.illustrativemathematics.org/illustrations/1221 | 6. Very good, but easier way??? | |||||

18 | 7. http://illuminations.nctm.org/LessonDetail.aspx?id=L854 | 7. Good, interesting method | ||||||

19 | LOOK FOR MORE activities on this website. It may be hard b/c standards aren’t noted. | |||||||

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