Operations and Algebraic Thinking  eTAP Lesson 

Represent and solve problems involving addition and subtraction.  
Use addition and subtraction within 100 to solve one and twostep word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
CCSS.Math.Content.2.OA.A.1 

Add and subtract within 20.  
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two onedigit numbers.
CCSS.Math.Content.2.OA.B.2 
Adding (within 20) Use Mental Arithmetic to Find Sums and Differences 
Work with equal groups of objects to gain foundations for multiplication.  
Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.
CCSS.Math.Content.2.OA.C.3 
Addition, Subtraction Problems Using Simple Charts 
Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.
CCSS.Math.Content.2.OA.C.4 

Number and Operations in Base Ten  eTAP Lesson 
Understand place value.  
Understand that the three digits of a threedigit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. 100 can be thought of as a bundle of ten tens — called a "hundred."
CCSS.Math.Content.2.NBT.A.1.a 
Count, Read, and Write Whole Numbers 100 1,000 
The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones).
CCSS.Math.Content.2.NBT.A.1.b 

Count within 1000; skipcount by 5s, 10s, and 100s.
CCSS.Math.Content.2.NBT.A.2 

Read and write numbers to 1000 using baseten numerals, number names, and expanded form.
CCSS.Math.Content.2.NBT.A.3 
Represent Numbers (11,000) in Different Forms 
Compare two threedigit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.
CCSS.Math.Content.2.NBT.A.4 

Use place value understanding and properties of operations to add and subtract.  
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
CCSS.Math.Content.2.NBT.B.5 
Addition Facts and Subtraction Facts 
Add up to four twodigit numbers using strategies based on place value and properties of operations.
CCSS.Math.Content.2.NBT.B.6 

Add and subtract within 1000, 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. Understand that in adding or subtracting threedigit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
CCSS.Math.Content.2.NBT.B.7 

Mentally add 10 or 100 to a given number 100900, and mentally subtract 10 or 100 from a given number 100900.
CCSS.Math.Content.2.NBT.B.8 
Use Mental Arithmetic to Find Sums and Differences 
Explain why addition and subtraction strategies work, using place value and the properties of operations.
CCSS.Math.Content.2.NBT.B.9 

Measurement and Data  eTAP Lesson 
Measure and estimate lengths in standard units.  
Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
CCSS.Math.Content.2.MD.A.1 
Measuring Length 
Measure the length of an object twice, using length units of different lengths for the two measurements; describe how the two measurements relate to the size of the unit chosen.
CCSS.Math.Content.2.MD.A.2 
Different Units to Measure the Same Object 
Estimate lengths using units of inches, feet, centimeters, and meters.
CCSS.Math.Content.2.MD.A.3 
Measuring to the Nearest Inch or Centimeter 
Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.
CCSS.Math.Content.2.MD.A.4 

Relate addition and subtraction to length.  
Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem.
CCSS.Math.Content.2.MD.B.5 
Word Problems using Addition and Subtraction 
Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent wholenumber sums and differences within 100 on a number line diagram.
CCSS.Math.Content.2.MD.B.6 

Work with time and money.  
Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.
CCSS.Math.Content.2.MD.C.7 
Telling Time to the Nearest 5 minutes 
Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately. Example: If you have 2 dimes and 3 pennies, how many cents do you have?
CCSS.Math.Content.2.MD.C.8 
Decimal Points, $ Sign, ¢ Symbol Word Problems with Money 
Represent and interpret data.  
Generate measurement data by measuring lengths of several objects to the nearest whole unit, or by making repeated measurements of the same object. Show the measurements by making a line plot, where the horizontal scale is marked off in wholenumber units.
CCSS.Math.Content.2.MD.D.9 
Choose the Appropriate Tools and Units to Estimate Measurement 
Draw a picture graph and a bar graph (with singleunit scale) to represent a data set with up to four categories. Solve simple puttogether, takeapart, and compare problems1 using information presented in a bar graph.
CCSS.Math.Content.2.MD.D.10 
Grouping Objects 
Geometry  eTAP Lesson 
Reason with shapes and their attributes.  
Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces. Identify triangles, quadrilaterals, pentagons, hexagons, and cubes.
CCSS.Math.Content.2.G.A.1 
Defining Shapes 
Partition a rectangle into rows and columns of samesize squares and count to find the total number of them.
CCSS.Math.Content.2.G.A.2 

Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape.
CCSS.Math.Content.2.G.A.3 