## Corrections

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

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

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 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 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 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."

## Lesson Numbering for Learning Targets

In some printed copies of the student workbooks, we erroneously printed a lesson number instead of the unit and lesson number. This table provides a key to match the printed lesson number with the unit and lesson number.

Lesson Number Unit and Lesson Lesson Title
1 1.1 What are Scaled Copies?
2 1.2 Corresponding Parts and Scale Factors
3 1.3 Making Scaled Copies
4 1.4 Scaled Relationships
5 1.5 The Size of the Scale Factor
6 1.6 Scaling and Area
7 1.7 Scale Drawings
8 1.8 Scale Drawings and Maps
9 1.9 Creating Scale Drawings
10 1.10 Changing Scales in Scale Drawings
11 1.11 Scales without Units
12 1.12 Units in Scale Drawings
13 1.13 Draw It to Scale
14 2.1 One of These Things Is Not Like the Others
15 2.2 Introducing Proportional Relationships with Tables
16 2.3 More about Constant of Proportionality
17 2.4 Proportional Relationships and Equations
18 2.5 Two Equations for Each Relationship
19 2.6 Using Equations to Solve Problems
20 2.7 Comparing Relationships with Tables
21 2.8 Comparing Relationships with Equations
22 2.9 Solving Problems about Proportional Relationships
23 2.10 Introducing Graphs of Proportional Relationships
24 2.11 Interpreting Graphs of Proportional Relationships
25 2.12 Using Graphs to Compare Relationships
26 2.13 Two Graphs for Each Relationship
27 2.14 Four Representations
28 2.15 Using Water Efficiently
29 3.1 How Well Can You Measure?
30 3.2 Exploring Circles
31 3.3 Exploring Circumference
32 3.4 Applying Circumference
33 3.5 Circumference and Wheels
34 3.6 Estimating Areas
35 3.7 Exploring the Area of a Circle
36 3.8 Relating Area to Circumference
37 3.9 Applying Area of Circles
38 3.10 Distinguishing Circumference and Area
39 3.11 Stained-Glass Windows
40 4.1 Lots of Flags
41 4.2 Ratios and Rates With Fractions
42 4.3 Revisiting Proportional Relationships
43 4.4 Half as Much Again
44 4.5 Say It with Decimals
45 4.6 Increasing and Decreasing
46 4.7 One Hundred Percent
47 4.8 Percent Increase and Decrease with Equations
48 4.9 More and Less than 1%
49 4.10 Tax and Tip
50 4.11 Percentage Contexts
51 4.12 Finding the Percentage
52 4.13 Measurement Error
53 4.14 Percent Error
54 4.15 Error Intervals
55 4.16 Posing Percentage Problems
56 5.1 Interpreting Negative Numbers
57 5.2 Changing Temperatures
58 5.3 Changing Elevation
59 5.4 Money and Debts
60 5.5 Representing Subtraction
61 5.6 Subtracting Rational Numbers
62 5.7 Adding and Subtracting to Solve Problems
63 5.8 Position, Speed, and Direction
64 5.9 Multiplying Rational Numbers
65 5.10 Multiply!
66 5.11 Dividing Rational Numbers
67 5.12 Negative Rates
68 5.13 Expressions with Rational Numbers
69 5.14 Solving Problems with Rational Numbers
70 5.15 Solving Equations with Rational Numbers
71 5.16 Representing Contexts with Equations
72 5.17 The Stock Market
73 6.1 Relationships between Quantities
74 6.2 Reasoning about Contexts with Tape Diagrams
75 6.3 Reasoning about Equations with Tape Diagrams
76 6.4 Reasoning about Equations and Tape Diagrams (Part 1)
77 6.5 Reasoning about Equations and Tape Diagrams (Part 2)
78 6.6 Distinguishing between Two Types of Situations
79 6.7 Reasoning about Solving Equations (Part 1)
80 6.8 Reasoning about Solving Equations (Part 2)
81 6.9 Dealing with Negative Numbers
82 6.10 Different Options for Solving One Equation
83 6.11 Using Equations to Solve Problems
84 6.12 Solving Problems about Percent Increase or Decrease
85 6.13 Reintroducing Inequalities
86 6.14 Finding Solutions to Inequalities in Context
87 6.15 Efficiently Solving Inequalities
88 6.16 Interpreting Inequalities
89 6.17 Modeling with Inequalities
90 6.18 Subtraction in Equivalent Expressions
91 6.19 Expanding and Factoring
92 6.20 Combining Like Terms (Part 1)
93 6.21 Combining Like Terms (Part 2)
94 6.22 Combining Like Terms (Part 3)
95 6.23 Applications of Expressions
96 7.1 Relationships of Angles
99 7.4 Solving for Unknown Angles
100 7.5 Using Equations to Solve for Unknown Angles
101 7.6 Building Polygons (Part 1)
102 7.7 Building Polygons (Part 2)
103 7.8 Triangles with 3 Common Measures
104 7.9 Drawing Triangles (Part 1)
105 7.10 Drawing Triangles (Part 2)
106 7.11 Slicing Solids
107 7.12 Volume of Right Prisms
108 7.13 Decomposing Bases for Area
109 7.14 Surface Area of Right Prisms
110 7.15 Distinguishing Volume and Surface Area
111 7.16 Applying Volume and Surface Area
112 7.17 Building Prisms
113 8.1 Mystery Bags
114 8.2 Chance Experiments
115 8.3 What Are Probabilities?
116 8.4 Estimating Probabilities Through Repeated Experiments
117 8.5 More Estimating Probabilities
118 8.6 Estimating Probabilities Using Simulation
119 8.7 Simulating Multi-step Experiments
120 8.8 Keeping Track of All Possible Outcomes
121 8.9 Multi-step Experiments
122 8.10 Designing Simulations
123 8.11 Comparing Groups
124 8.12 Larger Populations
125 8.13 What Makes a Good Sample?
126 8.14 Sampling in a Fair Way
127 8.15 Estimating Population Measures of Center
128 8.16 Estimating Population Proportions
129 8.17 More about Sampling Variability
130 8.18 Comparing Populations Using Samples
131 8.19 Comparing Populations With Friends
132 8.20 Memory Test