Title: Exploring Number Places

Grade Level: Year 4 (8-9 years old)

Objective: - Students will understand the concept of number places (ones, tens, hundreds) and their significance in representing numbers. - Students will be able to read, write, and compare numbers up to 1,000 using number places. - Students will practice regrouping and exchanging numbers between different places.

Materials: - Whiteboard or chart paper - Markers - Number cards (0-9) - Place value charts (ones, tens, hundreds) - Base-10 blocks (optional)

Procedure:

1. Introduction (10 minutes):
   • Begin by asking students if they know what number places are and how they are used.
   • Write a three-digit number (e.g., 365) on the board and ask students to identify the value of each digit.
   • Explain that numbers are made up of different places (ones, tens, hundreds) that represent different values.
2. Understanding Number Places (15 minutes):
   • Show students a place value chart for ones, tens, and hundreds.
   • Discuss the value of each place and how it changes as we move from right to left.
   • Use number cards to create different three-digit numbers on the board and ask students to identify the value of each digit.
3. Reading and Writing Numbers (15 minutes):
   • Give each student a number card (0-9) and ask them to create a three-digit number on their desk.
   • Have students take turns sharing their numbers with the class, reading them aloud, and identifying the value of each digit.
   • Write the numbers on the board and discuss any similarities or differences.
4. Comparing Numbers (15 minutes):
   • Write two three-digit numbers on the board (e.g., 482 and 579).
   • Ask students to compare the numbers and identify which is greater or smaller.
   • Discuss the importance of comparing numbers digit by digit, starting from the left.
5. Regrouping and Exchanging (20 minutes):
   • Introduce the concept of regrouping by writing a two-digit number (e.g., 47) on the board.
   • Explain that when we add or subtract numbers, we may need to regroup or exchange numbers between different places.
   • Use base-10 blocks (optional) to demonstrate regrouping when adding or subtracting numbers.
   • Provide practice problems for students to solve individually or in pairs, involving regrouping and exchanging.
6. Conclusion (5 minutes):
   • Review the main concepts covered in the lesson: number places, reading and writing numbers, comparing numbers, and regrouping.
   • Ask students to share one thing they learned or found interesting during the lesson.

Extension Activity: - Provide additional practice worksheets or online activities for students to reinforce their understanding of number places and regrouping. - Challenge students to create their own three-digit numbers and write them in expanded form (e.g., 365 = 300 + 60 + 5).

Assessment: - Observe students’ participation and engagement during class discussions and activities. - Review students’ responses during the comparison and regrouping exercises. - Evaluate students’ completion of the extension activity or any assigned worksheets.