Essential Questions:
Unit 1 instructional time is focused on these priority standards:
3.NBT.A.1 Use place value understanding to round whole numbers to the nearest 10 or 100.
3.NBT.A.2 Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
3.OA.D.8 Solve twostep word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
SAMPLE assessment items 3.OA.D.8
3.MD.A.1 Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.
Unit 1 instructions is supported by these standards:
3.MD.A.2 Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l).1 Add, subtract, multiply, or divide to solve onestep word problems involving masses or volumes that are given in the same units, e.g., by using drawings (such as a beaker with a measurement scale) to represent the problem.
3.MD.B.4 Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked off in appropriate units— whole numbers, halves, or quarters.
 Why is knowing place value important?
 How can knowing place value help you figure out if you have enough money to make a purchase?
 The position of a digit determines the value of a number.
 Understanding rounding to estimate can help you add and subtract large numbers.
Unit 1 instructional time is focused on these priority standards:
3.NBT.A.1 Use place value understanding to round whole numbers to the nearest 10 or 100.
3.NBT.A.2 Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
3.OA.D.8 Solve twostep word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
SAMPLE assessment items 3.OA.D.8
3.MD.A.1 Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.
Unit 1 instructions is supported by these standards:
3.MD.A.2 Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l).1 Add, subtract, multiply, or divide to solve onestep word problems involving masses or volumes that are given in the same units, e.g., by using drawings (such as a beaker with a measurement scale) to represent the problem.
3.MD.B.4 Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked off in appropriate units— whole numbers, halves, or quarters.
What to teachUnit 1 Outline
Preassessment Introduce Real World Experience Time: Tell Time to the Half Hour (ongoing)

Lesson Ideas 
Student PRactice 
Topic 1: Measuring Weight and Liquid Volume in Metric Units (6 days)

Topic 2: Rounding to the Nearest Tens or Hundreds (3 days)

Number Forms Matching Activity (go to districtshare, math activities, 3rd grade unit 1, lesson ideas)
Houghton Mifflin Leveled Practice wkst Unit 1

Topic 3: Adding within two and three digit numbers using standard algorithm (4 days)

Houghton Mifflin Leveled Practice wkst Unit 2
Ghost Blasters (2 digit by 1 digit) 
Topic 4: Subtract two and three digit numbers using standard algorithm (5 days)
Post Assessment & Reflection 