Title: Understanding Decimal Fractions
Grade Level: Primary 7 (1112 years old)
Objective:  Students will understand the concept of decimal fractions and their relationship to whole numbers.  Students will be able to read, write, and compare decimal fractions.  Students will be able to convert decimal fractions to fractions and vice versa.  Students will be able to perform basic operations (addition, subtraction, multiplication, and division) with decimal fractions.
Materials:  Whiteboard or blackboard  Markers or chalk  Decimal fraction cards (0.1, 0.2, 0.3, â€¦, 0.9)  Fraction cards (1/10, 2/10, 3/10, â€¦, 9/10)  Decimal fraction worksheets  Fraction worksheets  Calculators (optional)
Procedure:

Introduction (10 minutes)  Begin the lesson by asking students if they have heard of decimal fractions before. Write the term â€śdecimal fractionsâ€ť on the board and ask for any initial thoughts or ideas.  Explain that decimal fractions are a way to represent numbers that are less than one. They are written using a decimal point and digits after it.  Give examples of decimal fractions, such as 0.5, 0.75, and 0.25. Ask students to identify the whole number and the fractional part in each example.

Reading and Writing Decimal Fractions (15 minutes)  Distribute decimal fraction cards to each student. Ask them to read the decimal fraction on their card and write it as a whole number and a fraction.  Have students share their answers with a partner and discuss any differences or similarities they noticed.  Discuss the correct answers as a class and clarify any misconceptions.

Comparing Decimal Fractions (15 minutes)  Write two decimal fractions on the board, such as 0.3 and 0.7. Ask students to compare the two and determine which is greater.  Allow students to share their answers and explain their reasoning.  Introduce the concept of place value and explain that the digit in the tenths place determines the size of the decimal fraction.  Practice comparing decimal fractions using additional examples and encourage students to use place value to justify their answers.

Converting Decimal Fractions to Fractions (15 minutes)  Distribute fraction cards to each student. Ask them to convert the decimal fraction on their card to a fraction.  Have students share their answers with a partner and discuss any differences or similarities they noticed.  Discuss the correct answers as a class and provide explanations for the conversions.

Converting Fractions to Decimal Fractions (15 minutes)  Write a fraction on the board, such as 3/5. Ask students to convert it to a decimal fraction.  Allow students to share their answers and explain their reasoning.  Practice converting fractions to decimal fractions using additional examples and encourage students to use division or place value to perform the conversion.

Operations with Decimal Fractions (20 minutes)  Distribute decimal fraction worksheets to each student. Instruct them to solve the addition, subtraction, multiplication, and division problems involving decimal fractions.  Allow students to work individually or in pairs. Provide assistance and guidance as needed.  Review the answers as a class and discuss any common mistakes or challenges encountered.

Conclusion (5 minutes)  Summarize the key concepts covered in the lesson, including reading, writing, comparing, and converting decimal fractions.  Ask students to reflect on their understanding of decimal fractions and share any questions or areas they would like to explore further.  Provide additional resources or practice materials for students to continue their learning outside of the classroom.
Note: The duration of each activity can be adjusted based on the pace and needs of the students.