Essential Questions:
Unit 5 instructional time is focused on this power standard:
1.NBT.C.4 Add within 100, including adding a twodigit number and a onedigit number, and adding a twodigit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding twodigit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
Unit 5 instruction is supported by these standards:
1.OA.A.1 Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
1.OA.A.2 Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
1.OA.D.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.
1.NBT.C.5 Given a twodigit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
1.NBT.C.6 Subtract multiples of 10 in the range 1090 from multiples of 10 in the range 1090 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
1.MD.B.3 Tell and write time in hours and halfhours using analog and digital clocks.
1.MD.C.4 Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.
 How can you add or subtract big numbers quickly?
 How can you add or subtract big numbers easily and accurately?
 How to add and subtract 2 twodigit numbers using tens and ones without regrouping.
Unit 5 instructional time is focused on this power standard:
1.NBT.C.4 Add within 100, including adding a twodigit number and a onedigit number, and adding a twodigit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding twodigit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
Unit 5 instruction is supported by these standards:
1.OA.A.1 Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
1.OA.A.2 Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
1.OA.D.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.
1.NBT.C.5 Given a twodigit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
1.NBT.C.6 Subtract multiples of 10 in the range 1090 from multiples of 10 in the range 1090 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
1.MD.B.3 Tell and write time in hours and halfhours using analog and digital clocks.
1.MD.C.4 Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another.
What to TeachUnit 5 Outline
Preassessment Spanish Introduce Real World Experience Topic 1: Different Ways to Show Numbers (3 days)

Lesson Ideas 
Student Practice 
Topic 2: Show a number with tens and ones by using manipulatives (2 days)

Topic 3: Adding onedigit numbers to twodigit numbers (3 days)

Topic 4: Adding twodigit numbers and multiples of 10 using base ten blocks, number lines, hundreds charts etc.
(3 days)

Topic 5: Subtract multiples of 10 from multiples of 10 using base ten blocks, number lines, hundreds charts etc. (3 days)

Topic 6: Mentally find 10 more or 10 less (2 days)

Telling Time (ongoing)

Represent and Interpret Data within 20 (ongoing)

Problem Solving with Addition and Subtraction vocabulary within 20 (ongoing)

Thinking Blocks Jr.  online bar modeling practice for word problems
Word Problem Generator Bedtime Math websiteleveled problem of the day 