1.1 Thousands 1.2 Compare Numbers 1.3 Order Numbers 1.4 Round to Nearest Ten 1.5 Round to Nearest Hundred 1.6 Problem Solving Chapter 2: Addition 2.1 Addition Properties 2.4 Add Mentally 2.5 Estimate Sums 2.6 Adding 3 Numbers 2.9 Problem Solving Chapter 3: Subtraction 3.1 Subtract Mentally 3.2 Estimate Differences 3.3 Problem Solving 3.4 Subtraction ccsde0(enumber) Password: cobbmath1 Student User ID: ccsd(student ID) Password: cobbmath1 Examplar User: Cobb Email Password: First Name What’s the Problem? First in Math Student User ID: Password: 1.6 Subtracting on the Number Line 1.8 Finding Missing Parts Chapter 3: Using Addition and Subtraction 3.1 Magic Square 3.2 Magic Squares Chapter 5: Understanding Addition and Subtraction 5.1 Grouping by Tens 5.2 Rounding to the Nearest Ten or Hundred 5.3 Finding Differences 5.4 Using Tens and Hundreds to Estimate 5.5 Estimate and to Find the Sum Chapter 14: Addition and Subtraction in Depth 14.1 Place Value 14.2 Breaking Up Numbers to Add 14.3 Breaking Up Numbers to Subtract 14.4 Comparing Addition and Subtraction 14.5 Addition Shortcuts and Rounding 14.6 Addition and Subtraction Situations Additional Web Resources: National Council of Teachers of Mathematics, Illuminations: K-5 Math teaching Resources Mathematics TEKS Toolkit Estimation 180 is a website of 180 days of estimation ideas that build number sense.
Task Name Task Type Grouping Strategy Content Addressed Standard(s) Description Scaffolding Tasks Partners/Small Group Task Place Value, Addition and Subtraction MGSE3.NBT.1 MGSE3.NBT.2 This task provides an opportunity for students to decompose numbers in multiple ways. This will help them easily manipulate numbers as needed in computation, as well as understand the value of digits in numbers when rounding. Constructing Task Whole/Small Group Task Rounding numbers to the nearest 10 MGSE3.NBT.1 This task is an introductory lesson for rounding. Students build this understanding using a number line. Constructing Task Partner/Small Group Task Rounding, Using estimation and mental math with addition MGSE3.NBT.1 MGSE3.NBT.2 This task focuses on rounding as well as the understanding of the value of a digit. Practice Task Small Group Task Place Value, Rounding MGSE3.NBT.1 This task is used to help develop the understanding of the value of a digit as well as to support rounding concepts. Constructing Task Whole Class Task Using and sharing mental math strategies MGSE3.NBT.2 This task builds on the idea of various mental math strategies that could easily be addressed in Number Talks throughout the year. Constructing Task Small Group/Partner Task Mental Math with sums of 100 MGSE3.NBT.2 This task involves estimation with addition. It utilizes many mental math strategies developed in number talks and prior tasks. Constructing Task Partner/Small Group Task Mental Math with combinations of 100 MGSE3.NBT.2 This task involves estimation with addition. It utilizes many mental math strategies developed in Number Talks and prior tasks. 3-Act Task Whole Group Addition/Subtraction Problem Solving MGSE3.NBT.2 In this task, students will view a video and tell what they noticed. Next, they will be asked to discuss what they wonder about or are curious about. Students will then use mathematics to answer their own questions. Scaffolding Tasks Individually, Pairs, or Small Group Task Addition, Subtraction MGSE3.NBT.2 In this task, students will solve word problems requiring addition and subtraction. Constructing Task Individual/Partner Task Commutative, Identity and Associative Properties MGSE3.NBT.2 This task builds on the relationship of addition and subtraction by developing the understanding of the properties.