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| Lesson 1: Identifying What Mathematicians Do | |
| Lesson 2: Making Towers for the Numbers 1–5 | |
| Lesson 3: Writing the Numbers 1, 4, and 5 | |
| Lesson 4: Making Towers for the Numbers 1–9 / Ordering the Numbers 0–9 | |
| Lesson 5: Placing an Object on a Graph / Writing the Numbers 2, 3, and 7 | |
| Lesson 6: Identifying a Circle and a Square / Identifying the Number of Sides and Angles of a Square | |
| Lesson 7: Graphing a Picture on a Pictograph / Identifying Most and Fewest on a Graph / Identifying Right and Left | |
| Lesson 8: Writing the Numbers 0, 6, 8, and 9 | |
| Lesson 9: Ordering Sets From Smallest to Largest / Identifying Most and Fewest / Ordering Numbers From Least to Greatest | |
| Lesson 10-1: Matching a Number to a Set / Collecting and Sorting Data / Using Data to Construct a Bar-Type Graph | |
| Lesson 10-2: Written Assessment 1 / Oral Assessment 1 / Identifying the Steps in the Problem-Solving Process / Using Logical Reasoning to Solve a Problem | |
| Lesson 11: Identifying Morning and Afternoon / Identifying First, Last, Between, and Middle / Identifying First, Second, and Third | |
| Lesson 12: Acting Out “Some, Some More” and “Some, Some Went Away” Stories | |
| Lesson 13: Identifying a Triangle / Identifying the Number of Sides and Angles of a Triangle / Sorting by One Attribute | |
| Lesson 14: Making a Shape on a Geoboard / Identifying Inside and Outside | |
| Lesson 15-1: Acting Out and Drawing Pictures for “Some, Some More” and “Some, Some Went Away” Stories | |
| Lesson 15-2: Written Assessment 2 / Sorting by One Attribute | |
| Lesson 16: Counting Pennies | |
| Lesson 17: Identifying a Number Between Two Numbers | |
| Lesson 18: Dividing a Solid in Half | |
| Lesson 19: Picturing and Combining Sets / Graphing a Picture on a Pictograph | |
| Lesson 20-1: Counting From 0 to 23 | |
| Lesson 20-2: Written Assessment 3 / Oral Assessment 2 / Making an Organized List to Solve a Problem | |
| Lesson 21: Writing Addition Number Sentences / Representing Equivalent Forms of the Same Number | |
| Lesson 22: Identifying Ordinal Position to Sixth | |
| Lesson 23: Addition Facts: Doubles with Sums to 10 | |
| Lesson 24: Identifying a Rectangle / Identifying the Number of Sides and Angles of a Rectangle | |
| Lesson 25-1: Writing Number Sentences for “Some, Some More” Stories / Creating Addition Problem Stories | |
| Lesson 25-2: Written Assessment 4 / Identifying the Attributes of Pattern Blocks | |
| Lesson 26: Creating and Reading a Repeating Pattern | |
| Lesson 27: Addition Facts: Doubles with Sums to 18 | |
| Lesson 28: Addition Facts: Doubles with Sums to 18 | |
| Lesson 29: Identifying Lighter and Heavier Using a Balance | |
| Lesson 30-1: Addition Facts: Doubles with Sums to 18 | |
| Lesson 30-2: Written Assessment 5 / Oral Assessment 3 / Looking for a Pattern to Solve a Problem | |
| Lesson 31: Covering Designs with Pattern Blocks | |
| Lesson 32: Ordering Numbers to 20 / Adding 1 to a Number | |
| Lesson 33: Writing Number Sentences for “Some, Some Went Away” Stories / Creating Subtraction Problem Situations | |
| Lesson 34: Counting Backward From 10 to 1 / Adding 1 to a Number | |
| Lesson 35-1: Identifying Morning, Afternoon, Evening, and Night | |
| Lesson 35-2: Written Assessment 6 / Estimating and Measuring Length Using Nonstandard Units | |
| Lesson 36: Addition Facts: Adding 1 | |
| Lesson 37: Addition Facts: Adding 1 | |
| Lesson 38: Sorting Items and Creating a Graph | |
| Lesson 39: Weighing Objects Using Nonstandard Units | |
| Lesson 40-1: Finding a Sum by Counting On / Making and Reading a Bar Graph | |
| Lesson 40-2: Written Assessment 7 / Oral Assessment 4 / Using Logical Reasoning to Solve a Problem | |
| Lesson 41: Adding Facts: Adding 0 | |
| Lesson 42: Covering a Design in Different Ways | |
| Lesson 43: Counting by 10’s to 100 | |
| Lesson 44: Subtraction Facts: Subtracting 1 | |
| Lesson 45-1: Subtraction Facts: Subtracting 1 | |
| Lesson 46: Counting Dimes | |
| Lesson 47: Counting by 2’s | |
| Lesson 48: Telling Time to the Hour | |
| Lesson 49: Subtraction Facts: Subtracting 0 and Subtracting a Number From Itself | |
| Lesson 50-1: Estimating the Capacity of Containers / Ordering Containers by Capacity / Identifying 1-cup Liquid Measure | |
| Lesson 50-2: Written Assessment 9 / Oral Assessment 5 / Drawing a Picture to Solve a Problem | |
| Lesson 51: Identifying the Even Numbers to 20 | |
| Lesson 52: Identifying and Locating Numbers on a Hundred Number Chart | |
| Lesson 53: Counting Dimes and Pennies | |
| Lesson 54: Creating a Design with a Line of Symmetry / Identifying a Line of Symmetry | |
| Lesson 55-1: Drawing a Line of Symmetry / Identifying One Half of a Whole / Writing the Fraction One Half | |
| Lesson 55-2: Written Assessment 10 / Estimating and Measuring Capacity of Containers Using Nonstandard Units / Writing a Two-Digit Number for a Set of Objects / Comparing and Ordering Two-Digit Numbers | |
| Identify 56: Identifying Odd and Even Numbers | |
| Lesson 57: Numbering a Clockface / Showing Time to the Hour on a Clock | |
| Lesson 58: Adding 2 to an Even Number | |
| Lesson 59: Adding 2 to an Odd Number | |
| Lesson 60-1: Covering a Design with Pattern Blocks / Sorting, Counting, and Recording the Pattern Blocks | |
| Lesson 60-2: Written Assessment 11 / Oral Assessment 6 / Looking for a Pattern to Solve a Problem | |
| Lesson 61: Addition Facts: Adding 2 | |
| Lesson 62: Comparing and Ordering Objects by Length / Measuring Length Using Nonstandard Units | |
| Lesson 63: Writing the Numbers 0–10 Using Words | |
| Lesson 64: Identifying Pairs | |
| Lesson 65-1: Graphing Pieces Used to Cover a Design / Reading a Graph | |
| Lesson 65-2: Written Assessment 12 / Identifying Ordinal Position to 26th | |
| Lesson 66: Writing Money Amounts Using the Cent Symbol / Paying for Items Using Dimes and Pennies | |
| Lesson 67: Dividing a Square into Halves | |
| Lesson 68: Subtraction Facts: Subtracting 2 | |
| Lesson 69: Subtraction Facts: Subtracting 2 | |
| Lesson 70-1: Tallying / Counting by 5’s | |
| Lesson 70-2: Written Assessment 13 / Oral Assessment 7 / Drawing a Picture to Solve a Problem | |
| Lesson 71: Using a Ruler to Draw a Line Segment | |
| Lesson 72: Sorting Common Objects | |
| Lesson 73: Adding Two-Digit Numbers Without Regrouping Using Dimes and Pennies | |
| Lesson 74: Adding Two-Digit Numbers Without Regrouping Using Dimes and Pennies | |
| Lesson 75-1: Adding Two-Digit Numbers Without Regrouping Using Dimes and Pennies | |
| Lesson 75-2: Written Assessment 14 / Estimating and Measuring Area Using Nonstandard Units / Combining Geometric Shapes to Make New Geometric Shapes | |
| Lesson 76: Addition Facts: Showing Doubles Plus 1 Facts | |
| Lesson 77: Addition Facts: Identifying Doubles Plus 1 Facts | |
| Lesson 78: Addition Facts: Doubles Plus 1 Facts | |
| Lesson 79: Addition Facts: Doubles Plus 1 Facts | |
| Lesson 80-1: Addition Facts: Doubles Plus 1 Facts | |
| Lesson 80-2: Written Assessment 15 / Oral Assessment 8 / Guessing and Checking to Solve a Problem / Acting It Out to Solve a Problem | |
| Lesson 81: Adding Two-Digit Numbers Without Regrouping | |
| Lesson 82: Identifying How Many More on a Graph | |
| Lesson 83: Identifying and Making Congruent Shapes | |
| Lesson 84: Counting Large Collections / Grouping by 10’s | |
| Lesson 85-1: Using Concrete and Pictorial Models to Represent Two-Digit Numbers / Comparing Two-Digit Numbers / Identifying the Place Value of Digits in a Two-Digit Number | |
| Lesson 85-2: Written Assessment 16 / Trading Pennies for Dimes | |
| Lesson 86: Adding Two-Digit Numbers with Regrouping Using Dimes and Pennies | |
| Lesson 87: Telling Time to the Half Hour | |
| Lesson 88: Dividing any Shape into Fourths / Coloring Halves and Fourths | |
| Lesson 89: Adding 10 to a Number | |
| Lesson 90-1: Counting by 10’s From a Single-Digit Number | |
| Lesson 90-2: Written Assessment 17 / Oral Assessment 9 / Drawing a Picture to Solve a Problem | |
| Lesson 91: Adding 10 to a Number | |
| Lesson 92: Comparing and Ordering Numbers to 100 | |
| Lesson 93: Count by 100’s | |
| Lesson 94: Addition Facts: Sums of 10 / Identifying a Missing Addend | |
| Lesson 95-1: Addition Facts: Sums of 10 | |
| Lesson 95-2: Written Assessment 18 / Estimating and Measuring Length Using Nonstandard Units / Comparing the Size of the Unit and the Number of Units Used to Measure an Object | |
| Lesson 96: Drawing Congruent Shapes and Designs | |
| Lesson 97: Measuring and Drawing Line Segments to the Nearest Inch | |
| Lesson 98: Counting Nickels | |
| Lesson 99: Counting Nickels and Pennies | |
| Lesson 100-1: Ordering Events by Time | |
| Lesson 100-2: Written Assessment 19 / Oral Assessment 10 / Making an Organized List to Solve a Problem | |
| Lesson 101: Subtraction Facts: Subtracting a Number From 10 | |
| Lesson 102: Subtraction Facts: Subtracting a Number From 10 | |
| Lesson 103: Identifying Dozen and Half Dozen | |
| Lesson 104: Estimating and Measuring Distances Using Feet / Creating a Measuring Tool | |
| Lesson 105-1: Addition Facts: Adding 9 | |
| Lesson 105-2: Written Assessment 20 / Identifying One-, Five-, Ten-, and Twenty-Dollar Bills / Writing Money Amounts Using a Dollar Sign | |
| Lesson 106: Addition Facts: Adding 9 | |
| Lesson 107: Identifying One Half, One Third, and One Sixth | |
| Lesson 108: Using Comparison Symbols (>, <, and =) | |
| Lesson 109: Dividing a Set of Objects by Sharing | |
| Lesson 110-1: Identifying Cup, Quart, Gallon, and Liter Containers / Estimating and Measuring the Capacity of a Container in Cups | |
| Lesson 110-2: Written Assessment 21 / Oral Assessment 11 / Acting It Out to Solve a Problem / Drawing a Picture to Solve a Problem | |
| Lesson 111: Addition Facts: Four of the Last Eight Facts | |
| Lesson 112: Identifying Geometric Solids (Cones and Spheres) | |
| Lesson 113: Using Bills to Pay for Items to $20 | |
| Lesson 114: Adding Three Single-Digit Numbers | |
| Lesson 115-1: Addition Facts: The Last Four Facts | |
| Lesson 115-2: Written Assessment 22 / Rounding a Number to the Nearest Multiple of 10 by Estimating | |
| Lesson 116: Counting Dimes, Nickels, and Pennies | |
| Lesson 117: Identifying Fractional Parts of a Whole | |
| Lesson 118: Graphing Tags on a Bar Graph / Writing Observations About a Graph | |
| Lesson 119: Measuring and Drawing Line Segments to the Nearest Centimeter | |
| Lesson 120-1: Identifying Geometric Solids (Cubes and Cylinders) | |
| Lesson 120-2: Written Assessment 23 / Oral Assessment 12 / Guessing and Checking to Solve a Problem / Acting It Out to Solve a Problem | |
| Lesson 121: Subtraction Facts: Differences of 1 | |
| Lesson 122: Identifying a Fractional Part of a Set | |
| Lesson 123: Subtracting 10 From a Number | |
| Lesson 124: Identifying and Drawing Polygons | |
| Lesson 125-1: Subtraction Facts: Differences of 2 | |
| Lesson 125-2: Written Assessment 24 / Identifying Geometric Solids (Rectangular Prisms) | |
| Lesson 126: Identifying and Counting Quarters / Showing Money Amounts Using Coins | |
| Lesson 127: Subtracting Two-Digit Numbers Without Regrouping | |
| Lesson 128: Identifying Cold, Cool, Warm, and Hot Temperatures / Reading a Thermometer to the Nearest 10 Degrees | |
| Lesson 129: Subtraction Facts: Subtracting Half of a Double | |
| Lesson 130-1: Identifying Events as Certain, Likely, or Impossible | |
| Lesson 130-2: Written Assessment 25 / Oral Assessment 13 / Drawing a Picture to Solve a Problem / Using a Table to Solve a Problem | |
| Lesson 131: Identifying and Counting Hundreds, Tens, and Ones | |
| Lesson 132: Writing Addition and Subtraction Fact Families / Subtraction Facts: 9 – 4, 9 – 5, 9 – 3, and 9 – 6 | |
| Lesson 133: Representing Numbers to 500 Using Pictures | |
| Lesson 134: Writing Addition and Subtraction Fact Families / Subtraction Facts: 7 – 3, 7 – 4, 8 – 3, and 8 – 5 | |
| Lesson 135: Written Assessment 26 / Estimating and Weighing Objects Using Nonstandard Units / Exploring Standard Units of Mass | |
| Lesson A: Subtraction Facts: Minuends Greater Than 10 | |
| Lesson B: Using a Calculator to Explore Addition, Subtraction, and Skip Counting | |
| Lesson C: Ordering Two or More Objects by Temperature / Measuring Temperature Using a Thermometer | |
| Lesson D: Exploring Transformations: Slides (Translations), Turns (Rotations), and Flips (Reflections) |