In math, the term "difference" refers to the result of subtracting one number from another. It is the amount by which one number is greater or smaller than another. For example, the difference between 7 and 3 is 4 because 7 - 3 = 4.

1. **Identifying Numbers:** Practice recognizing and writing numbers from 1 to 20. This will help in understanding the concept of difference.

2. **Counting:** Practice counting objects up to 20. Counting helps in understanding how numbers relate to each other.

3. **Number Line:** Introduce the concept of a number line and demonstrate how to use it to find the difference between two numbers.

4. **Subtraction:** Teach the concept of subtraction using objects and visual aids. Show how taking away some objects from a group results in a difference in the total count.

5. **Practice Exercises:** Provide simple subtraction exercises such as "What is the difference between 9 and 5?" and encourage the child to use objects or a number line to find the answer.

6. **Real-life Examples:** Point out real-life examples of differences, such as the difference in the number of apples in two baskets or the difference in heights of two people.

Study GuideOdd and Even Worksheet/Answer key

Odd and Even Worksheet/Answer key

Odd and Even Worksheet/Answer key

Odd and Even Worksheet/Answer keyIdentifying Even and Odd Numbers

Number and Operations (NCTM)

Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

Count with understanding and recognize 'how many' in sets of objects.

Develop a sense of whole numbers and represent and use them in flexible ways, including relating, composing, and decomposing numbers.

Connect number words and numerals to the quantities they represent, using various physical models and representations.

Grade 1 Curriculum Focal Points (NCTM)

Number and Operations: Developing an understanding of whole number relationships, including grouping in tens and ones

Children compare and order whole numbers (at least to 100) to develop an understanding of and solve problems involving the relative sizes of these numbers. They think of whole numbers between 10 and 100 in terms of groups of tens and ones (especially recognizing the numbers 11 to 19 as 1 group of ten and particular numbers of ones). They understand the sequential order of the counting numbers and their relative magnitudes and represent numbers on a number line.

Connections to the Grade 1 Focal Points (NCTM)

Algebra: Through identifying, describing, and applying number patterns and properties in developing strategies for basic facts, children learn about other properties of numbers and operations, such as odd and even (e.g., 'Even numbers of objects can be paired, with none left over'), and 0 as the identity element for addition.