## Holidays

## Math

World HolidaysChristmas Day Ordinals Kindergarten Math Lines and Angles Fourth Grade Math Attributes First Grade Math Money Kindergarten Math Fractions Second Grade Math Calendar Second Grade Math ### CO.2.1. Number Sense, Properties, and Operations

#### 2.1.1. The whole number system describes place value relationships through 1,000 and forms the foundation for efficient algorithms. Students can:

##### 2.1.1.a. Use place value to read, write, count, compare, and represent numbers. (CCSS: 2.NBT)

###### 2.1.1.a.i. Represent the digits of a three-digit number as hundreds, tens, and ones. (CCSS: 2.NBT.1)

###### 2.1.1.a.ii. Count within 1000. (CCSS: 2.NBT.2)

###### 2.1.1.a.iii. Skip-count by 5s, 10s, and 100s. (CCSS: 2.NBT.2)

###### 2.1.1.a.iv. Read and write numbers to 1000 using base-ten numerals, number names, and expanded form. (CCSS: 2.NBT.3)

###### 2.1.1.a.v. Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons. (CCSS: 2.NBT.4)

##### 2.1.1.b. Use place value understanding and properties of operations to add and subtract. (CCSS: 2.NBT)

###### 2.1.1.b.i. Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. (CCSS: 2.NBT.5)

###### 2.1.1.b.ii. Add up to four two-digit numbers using strategies based on place value and properties of operations. (CCSS: 2.NBT.6)

###### 2.1.1.b.iii. 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. (CCSS: 2.NBT.7)

###### 2.1.1.b.v. Explain why addition and subtraction strategies work, using place value and the properties of operations. (CCSS: 2.NBT.9)

#### 2.1.2. Formulate, represent, and use strategies to add and subtract within 100 with flexibility, accuracy, and efficiency. Students can:

##### 2.1.2.a. Represent and solve problems involving addition and subtraction. (CCSS: 2.OA)

###### 2.1.2.a.i. 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. (CCSS: 2.OA.1)

###### 2.1.2.a.ii. Apply addition and subtraction concepts to financial decision making (PFL).

##### 2.1.2.b. Fluently add and subtract within 20 using mental strategies. (CCSS: 2.OA.2)

##### 2.1.2.c. Know from memory all sums of two one-digit numbers. (CCSS: 2.OA.2)

##### 2.1.2.d. Use equal groups of objects to gain foundations for multiplication. (CCSS: 2.OA)

###### 2.1.2.d.ii. Write an equation to express an even number as a sum of two equal addends. (CCSS: 2.OA.3)

### CO.2.3. Data Analysis, Statistics, and Probability

#### 2.3.1. Visual displays of data can be constructed in a variety of formats to solve problems. Students can:

##### 2.3.1.a. Represent and interpret data. (CCSS: 2.MD)

###### 2.3.1.a.i. 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. (CCSS: 2.MD.9)

###### 2.3.1.a.ii. Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories. (CCSS: 2.MD.10)

###### 2.3.1.a.iii. Solve simple put together, take-apart, and compare problems using information presented in picture and bar graphs. (CCSS: 2.MD.10)

### CO.2.4. Shape, Dimension, and Geometric Relationships

#### 2.4.1. Shapes can be described by their attributes and used to represent part/whole relationships. Students can:

##### 2.4.1.a. Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces. (CCSS: 2.G.1)

##### 2.4.1.b. Identify triangles, quadrilaterals, pentagons, hexagons, and cubes. (CCSS: 2.G.1)

##### 2.4.1.d. 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. (CCSS: 2.G.3)

##### 2.4.1.e. Recognize that equal shares of identical wholes need not have the same shape. (CCSS: 2.G.3)

#### 2.4.2. Some attributes of objects are measurable and can be quantified using different tools. Students can:

##### 2.4.2.a. Measure and estimate lengths in standard units. (CCSS: 2.MD)

###### 2.4.2.a.i. Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes. (CCSS: 2.MD.1)

###### 2.4.2.a.iv. Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit. (CCSS: 2.MD.4)

##### 2.4.2.b. Relate addition and subtraction to length. (CCSS: 2.MD)

###### 2.4.2.b.ii. Represent whole numbers as lengths from 0 on a number line diagram and represent whole-number sums and differences within 100 on a number line diagram. (CCSS: 2.MD.6)

##### 2.4.2.c. Solve problems time and money. (CCSS: 2.MD)

###### 2.4.2.c.i. Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m. (CCSS: 2.MD.7)

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