Note: Later printings of these materials may have some of these corrections already in place. 

Unit 1, Lesson 4, Activity 4. In the activity synthesis, instead of "one pair of corresponding segments with different lengths" it should say "two pairs of corresponding segments with different scale factors."

Unit 1, Lesson 8, Activity 2. In the student response for #1, instead of "0.817 miles per minute" it should say "0.917 miles per minute."

Unit 1, Lesson 11, Activity 2. In the extension, the values given in the table should be Mercury 35, Venus 67, Earth 93, Mars 142, Jupiter 484, Saturn 887, Uranus 1784, Neptune 2795.

Unit 2, Lesson 1, Activity 2. In the activity synthesis, in the second table instead of \(1\frac12\) it should say \(\frac12\).

Unit 2, Lesson 6. In the lesson summary, instead of "20,300 feet above sea level" it should say "20,310 feet above sea level."

Unit 2, Lesson 6, Activity 2. In the student response, in the table instead of "622,200" it should say "622,000."

Unit 2, Lesson 11, Activity 2. In the student response for "Are you ready for more?" instead of \((20,40)\) it should say \((20,50)\).

Unit 2 Glossary. In the definition of "coordinate plane" instead of "to the left" it should say "to the right."

Unit 3, Lesson 9. The learning goal that says "Calculate the surface area of a rectangular prism and explain (orally and in writing) the solution method." should be removed and replaced with "Calculate the area of a shape that includes circular or semi-circular parts, and explain (orally and in writing) the solution method."

Unit 3, End of Unit Assessment B. In the student response for #7, instead of "number of gallons . . . 0.9 of a gallon" it should say "number of cans . . . 0.9 of a can."

Unit 4, Lesson 9, Activity 3. In the student response for "Are you ready for more?" instead of "about 5.63% . . . Step 17" it should say "about 7.51% . . . Step 18."

Unit 4, Lesson 9, Cool-down. In the student response, instead of "715,000,000 . . . 721,000,000" it should say "7,150,000 . . . 7,210,000."

Unit 4, Lesson 14, Activity 2. In the student response for #3, instead of "0.21%" it should say "21%." In the activity synthesis, instead of \(\frac{14}{2,486}\) it should say \(\frac{514}{2,486}\).

Unit 4, End of Unit Assessment, Item 3, Removed alignment to standard 7.G.A.1.

Unit 5, Lesson 14, Activity 2. In the student response for #2, instead of "782 . . . 796 . . . 810 . . . 824 . . . 838" it should say "784 . . . 798 . . . 812 . . . 826 . . . 840."

Unit 5, Lesson 16, Activity 3. In the student response for #1, instead of "1, 4, 5, 2, 6, 3" it should say "Diagram A, Diagram D, Diagram E, Diagram B, Diagram F, Diagram C."

Unit 6, Lesson 2, Activity 1. In the student response, instead of "large rectangle and they appear to be the same length as each other" it should say "large rectangle partitioned into smaller rectangles".

Unit 6, Lesson 13, Activity 3. In the student response, move each row header up one row to match the table in the task statement.

Unit 6, Lesson 16, Activity 1. In the student response, instead of "4" it should say "4.375."

Unit 6, Lesson 19, Practice Problem 6. Option C should say \(4x < \text-20\) and option D should say \(x < \text-5\).

Unit 6, Lesson 21, Practice Problem 6. In the solution, instead of "quarts" it should say "gallons."

Unit 6, Lesson 22, Practice Problem 3. In the solution, instead of "\( . . . \)" it should say "\(126.89 + x + 3.5x - 25 = \text-151.89 +4.5x\) . . . \(350 - x - (x + 50) + 75 = 375 - 2x\)."

Unit 7, Lesson 12, Activity 4. In the task statement, the image of Figure C is incorrect. It should have an area of 12 square units, not 14. Also, in the student response for #1, instead 'D, B, A, C" it should say "C, A, B, D."

Unit 8, Mid-unit assessment, question 3. D is not a correct answer.

Unit 8, Lesson 18, Activity 3. In the table on the row with sample 8, instead of "5.2" it should say "5.3." In the student response for #1b, instead of "Sample 8" it should say "Sample 7." Also, in the student response for #4, in the column for sample 8, instead of "9.6" it should say "9.5."

Unit 8, Lesson 19, Activity 3. In the student response, instead of "MAD is 0.61" it should say "MAD is 0.78."

Unit 8 Glossary. In the definition of "proportion" instead of "a class has 18 students . . . 16 right-handed students" it should say "a class has 20 students . . . 18 right-handed students."