## Khan Academy CCSS Lesson Links

2.OA.A.1

2.OA.A.1 Use addition and subtraction within 100 to solve one- and two-step 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.

2.OA.A.1

Addition word problems - one digit (2-E.13)

2.OA.A.1

Write the addition sentence - one digit (2-E.15)

2.OA.A.1

Add three one-digit numbers: word problems (2-E.19)

2.OA.A.1

Add four or more one-digit numbers: word problems (2-E.21)

2.OA.A.1

Subtraction word problems - up to 18 (2-F.11)

2.OA.A.1

Write the subtraction sentence - up to 18 (2-F.13)

2.OA.A.1

Addition word problems - up to two digits (2-G.9)

2.OA.A.1

Write the addition sentence - up to two digits (2-G.11)

2.OA.A.1

Add three numbers up to two digits each: word problems (2-G.14)

2.OA.A.1

Add four or more numbers up to two digits each: word problems (2-G.16)

2.OA.A.1

Subtraction word problems - up to two digits (2-H.9)

2.OA.A.1

Write the subtraction sentence - up to two digits (2-H.11)

2.OA.A.1

Addition and subtraction word problems - up to 20 (2-L.3)

2.OA.A.1

Addition and subtraction word problems - up to 100 (2-L.10)

2.OA.B.2

2.OA.B.2 Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

2.OA.B.2

Review - add one-digit numbers - sums to 10 (2-E.1)

2.OA.B.2

Review - ways to make a number - sums to 10 (2-E.2)

2.OA.B.2

2.OA.B.2

2.OA.B.2

Add doubles - complete the sentence (2-E.12)

2.OA.B.2

Complete the addition sentence - one digit (2-E.14)

2.OA.B.2

Addition equations: true or false? (2-E.17)

2.OA.B.2

Add three one-digit numbers (2-E.18)

2.OA.B.2

Review - subtract one-digit numbers - up to 10 (2-F.1)

2.OA.B.2

Review - ways to subtract - up to 10 (2-F.2)

2.OA.B.2

2.OA.B.2

Subtract a one-digit number from a two-digit number up to 18 (2-F.8)

2.OA.B.2

2.OA.B.2

Complete the subtraction sentence - up to 18 (2-F.12)

2.OA.B.2

Subtraction equations: true or false? (2-F.15)

2.OA.B.2

Add and subtract numbers up to 20 (2-L.1)

2.OA.B.2

Addition and subtraction - ways to make a number - up to 20 (2-L.2)

2.OA.B.2

Addition and subtraction equations up to 20: true or false? (2-L.5)

2.OA.C.3

2.OA.C.3 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.

2.OA.C.3

2.OA.C.3

Add doubles - complete the sentence (2-E.12)

2.OA.C.4

2.OA.C.4 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.

2.OA.C.4

Identify repeated addition in arrays: sums to 10 (2-E.22)

2.OA.C.4

Write addition sentences for arrays: sums to 10 (2-E.23)

2.OA.C.4

Identify repeated addition in arrays: sums to 25 (2-E.24)

2.OA.C.4

Write addition sentences for arrays: sums to 25 (2-E.25)

2.NBT.A.1

2.NBT.A.1 Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:

2.NBT.A.1

Place value models - up to hundreds (2-M.2)

2.NBT.A.1

Identify a digit up to the hundreds place (2-M.4)

2.NBT.A.1

Place value - up to hundreds (2-M.6)

2.NBT.A.1

Convert to/from a number - up to hundreds (2-M.11)

2.NBT.A.1a

2.NBT.A.1a 100 can be thought of as a bundle of ten tens - called a "hundred."

2.NBT.A.1b

2.NBT.A.1b 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).

2.NBT.A.2

2.NBT.A.2 Count within 1000; skip-count by 5s, 10s, and 100s.

2.NBT.A.2

2.NBT.A.3

2.NBT.A.3 Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

2.NBT.A.3

Writing numbers up to 100 in words - convert words to digits (2-C.2)

2.NBT.A.3

Writing numbers up to 100 in words - convert digits to words (2-C.3)

2.NBT.A.3

Writing numbers up to 1,000 in words - convert words to digits (2-C.4)

2.NBT.A.3

Writing numbers up to 1,000 in words - convert digits to words (2-C.5)

2.NBT.A.3

Convert from expanded form - up to hundreds (2-M.14)

2.NBT.A.4

2.NBT.A.4 Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.

2.NBT.A.4

Comparing numbers up to 1,000 (2-B.2)

2.NBT.B.5

2.NBT.B.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

2.NBT.B.5

2.NBT.B.5

2.NBT.B.5

Add a two-digit and a one-digit number - without regrouping (2-G.3)

2.NBT.B.5

Add a two-digit and a one-digit number - with regrouping (2-G.4)

2.NBT.B.5

Add two two-digit numbers - without regrouping (2-G.5)

2.NBT.B.5

Add two two-digit numbers - with regrouping (2-G.6)

2.NBT.B.5

Ways to make a number using addition (2-G.8)

2.NBT.B.5

Complete the addition sentence - up to two digits (2-G.10)

2.NBT.B.5

Subtract multiples of 10 (2-H.1)

2.NBT.B.5

Subtract a one-digit number from a two-digit number - without regrouping (2-H.3)

2.NBT.B.5

Subtract a one-digit number from a two-digit number - with regrouping (2-H.4)

2.NBT.B.5

Subtract two two-digit numbers - without regrouping (2-H.5)

2.NBT.B.5

Subtract two two-digit numbers - with regrouping (2-H.6)

2.NBT.B.5

Ways to make a number using subtraction (2-H.8)

2.NBT.B.5

Complete the subtraction sentence - up to two digits (2-H.10)

2.NBT.B.5

Add and subtract numbers up to 100 (2-L.8)

2.NBT.B.5

Addition and subtraction - ways to make a number - up to 100 (2-L.9)

2.NBT.B.5

Which sign (+ or -) makes the number sentence true? (2-L.15)

2.NBT.B.6

2.NBT.B.6 Add up to four two-digit numbers using strategies based on place value and properties of operations.

2.NBT.B.6

Add three numbers up to two digits each (2-G.13)

2.NBT.B.6

Add four or more numbers up to two digits each (2-G.15)

2.NBT.B.7

2.NBT.B.7 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 three-digit 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.

2.NBT.B.7

2.NBT.B.7

Add multiples of 10 or 100 (2-I.2)

2.NBT.B.7

Addition with three-digit numbers (2-I.3)

2.NBT.B.7

Complete the addition sentence - up to three digits (2-I.6)

2.NBT.B.7

Subtract multiples of 100 (2-J.1)

2.NBT.B.7

Subtract multiples of 10 or 100 (2-J.2)

2.NBT.B.7

Subtract three-digit numbers (2-J.3)

2.NBT.B.7

Complete the subtraction sentence - up to three digits (2-J.6)

2.NBT.B.7

Regroup tens and ones - ways to make a number (2-M.9)

2.NBT.B.7

Regroup tens and ones (2-M.10)

2.NBT.B.8

2.NBT.B.8 Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.

Input/output tables - add and subtract by 100 (2-L.13)

Input/output tables - add and subtract by 10 or 100 (2-L.14)

2.NBT.B.9

2.NBT.B.9 Explain why addition and subtraction strategies work, using place value and the properties of operations.

2.NBT.B.9

Related addition facts (2-K.1)

2.NBT.B.9

Related subtraction facts (2-K.2)

2.NBT.B.9

2.MD.A.1

2.MD.A.1 Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.

2.MD.A.1

Measure using an inch ruler (2-S.2)

2.MD.A.1

Measure using a centimeter ruler (2-S.8)

2.MD.A.2

2.MD.A.2 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.

2.MD.A.2

Which customary unit of length is appropriate? (2-S.3)

2.MD.A.2

Which metric unit of length is appropriate? (2-S.9)

2.MD.A.3

2.MD.A.3 Estimate lengths using units of inches, feet, centimeters, and meters.

2.MD.A.3

Which metric unit of length is appropriate? (2-S.9)

2.MD.A.4

2.MD.A.4 Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit.

2.MD.A.4

Customary units of length: word problems (2-S.4)

2.MD.A.4

Metric units of length: word problems (2-S.10)

2.MD.B.5

2.MD.B.5 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.

2.MD.B.5

Customary units of length: word problems (2-S.4)

2.MD.B.5

Metric units of length: word problems (2-S.10)

2.MD.B.6

2.MD.B.6 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 whole-number sums and differences within 100 on a number line diagram.

2.MD.B.6

Number lines - up to 100 (2-A.6)

2.MD.B.6

Number lines - up to 1,000 (2-A.8)

2.MD.B.6

Addition sentences using number lines - sums up to 20 (2-E.6)

2.MD.B.6

Subtraction sentences using number lines - numbers up to 20 (2-F.7)

2.MD.C.7

2.MD.C.7 Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.

2.MD.C.7

Match digital clocks and times (2-Q.1)

2.MD.C.7

Match analog clocks and times (2-Q.2)

2.MD.C.7

Match analog and digital clocks (2-Q.3)

2.MD.C.7

Read clocks and write times: hour and half hour (2-Q.4)

2.MD.C.7

Read clocks and write times (2-Q.5)

2.MD.C.7

2.MD.C.8

2.MD.C.8 Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately.

2.MD.C.8

Names and values of common coins (2-P.1)

2.MD.C.8

Count money - pennies, nickels, and dimes only (2-P.3)

2.MD.C.8

Count money - up to $1 (2-P.4)

2.MD.C.8

Count money - up to $5 (2-P.5)

2.MD.C.8

Equivalent amounts of money - up to $1 (2-P.6)

2.MD.C.8

2.MD.C.8

Comparing groups of coins (2-P.8)

2.MD.C.8

2.MD.C.8

Add money - up to $1: word problems (2-P.10)

2.MD.C.8

Subtract money - up to $1 (2-P.11)

2.MD.C.8

Subtract money - up to $1: word problems (2-P.12)

2.MD.C.8

Add and subtract money - up to $1 (2-P.13)

2.MD.C.8

Add and subtract money - up to $1: word problems (2-P.14)

2.MD.C.8

Purchases - do you have enough money - up to $1 (2-P.15)

2.MD.C.8

Purchases - do you have enough money - up to $5 (2-P.16)

2.MD.C.8

Which picture shows more - up to $5 (2-P.17)

2.MD.C.8

Least number of coins (2-P.18)

2.MD.C.8

How much more to make a dollar? (2-P.19)

2.MD.C.8

2.MD.D.9

2.MD.D.9 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 whole-number units.

2.MD.D.9

2.MD.D.10

2.MD.D.10 Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories. Solve simple put-together, take-apart, and compare problems using information presented in a bar graph.

2.MD.D.10

Interpret bar graphs II (2-R.3)

2.MD.D.10

Which bar graph is correct? (2-R.4)

2.G.A.1

2.G.A.1 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.

2.G.A.1

Name the two-dimensional shape (2-T.1)

2.G.A.1

Select two-dimensional shapes (2-T.2)

2.G.A.1

Count sides and vertices (2-T.3)

2.G.A.1

Compare sides and vertices (2-T.4)

2.G.A.1

Count vertices, edges, and faces (2-U.3)

2.G.A.1

Compare vertices, edges, and faces (2-U.4)

2.G.A.1

Identify faces of three-dimensional shapes (2-U.5)

2.G.A.1

Identify shapes traced from solids (2-U.6)

2.G.A.2

2.G.A.2 Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.

2.G.A.2

2.G.A.3

2.G.A.3 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.

2.G.A.3