Essential Questions:
Big Ideas:
Unit 4 instructional time is focused on these power standards.
1.NBT.B.3 Compare two twodigit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
1.NBT.B.2.A 10 can be thought of as a bundle of ten ones  called a "ten."
1.NBT.B.2.B The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
1.NBT.B.2.C The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).
Unit 4 instruction is supported by the following 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.A.1 Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.
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 comes in groups of tens?
 If you have 25 markers and 10 come in a box. How many boxes would you need?
Big Ideas:
 A twodigit numbers consists of groups of tens and ones.
 Compare 2 twodigit numbers.
Unit 4 instructional time is focused on these power standards.
1.NBT.B.3 Compare two twodigit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
1.NBT.B.2.A 10 can be thought of as a bundle of ten ones  called a "ten."
1.NBT.B.2.B The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
1.NBT.B.2.C The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).
Unit 4 instruction is supported by the following 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.A.1 Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.
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 4 Outline
Preassessment Spanish Introduce Real World Experience Topic 1: Counting Tens (2 days)

Lesson Ideas 
Student Practice 
Topic 2: Understanding 2digit Numbers (3 days)
Real World Experience Task 1 & 2 
Topic 3: Regrouping/grouping of tens and ones (3 days)

Topic 4: Compare 2 twodigit numbers (3 days)

Topic 5: 1 more, 1 less (2 days)

Topic 6: 10 more, 10 less (3 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 