Title: Exploring Tens and Ones: Representing Numbers up to 50

Grade Level: 1st or 2nd grade

Learning Intention: Students will be able to represent numbers up to 50 using tens and ones.

Duration: 45 minutes

Materials: - Base ten blocks (tens and ones) - Whiteboard or chart paper - Markers - Number cards (0-50) - Worksheets or activity sheets (optional)

Lesson Outline:

1. Introduction (5 minutes)
   • Begin the lesson by asking students if they know what tens and ones are.
   • Explain that tens and ones are a way to represent numbers using groups of ten and individual units.
   • Share the learning intention: “Today, we will learn how to represent numbers up to 50 using tens and ones.”
2. Review of Place Value (10 minutes)
   • Review the concept of place value by drawing a place value chart on the whiteboard or chart paper.
   • Label the columns as “Tens” and “Ones.”
   • Ask students to recall the value of each place (e.g., tens place represents groups of ten, ones place represents individual units).
   • Give examples of numbers and ask students to identify the value of each digit in terms of tens and ones (e.g., 24 has 2 tens and 4 ones).
3. Introduction to Base Ten Blocks (10 minutes)
   • Introduce base ten blocks as a visual representation of tens and ones.
   • Show students a ten block and explain that it represents ten units.
   • Show students a one block and explain that it represents one unit.
   • Demonstrate how to build numbers using base ten blocks (e.g., 34 = 3 tens + 4 ones).
   • Allow students to explore the base ten blocks and practice building numbers in pairs or small groups.
4. Guided Practice (10 minutes)
   • Distribute number cards (0-50) to each student.
   • Call out a number and ask students to represent it using base ten blocks on their desks.
   • Walk around the classroom to provide support and check for understanding.
   • Discuss the representations as a whole class, emphasizing the value of each digit in terms of tens and ones.
5. Independent Practice (10 minutes)
   • Provide students with worksheets or activity sheets that require them to represent numbers up to 50 using tens and ones.
   • Circulate the classroom to provide assistance and monitor progress.
   • Collect the completed worksheets for assessment purposes.
6. Conclusion (5 minutes)
   • Recap the lesson by asking students to share one thing they learned about representing numbers using tens and ones.
   • Emphasize the importance of understanding place value in mathematics.
   • Encourage students to practice representing numbers using tens and ones in their daily lives.

Extension Activity: - Challenge students to create their own number cards and play a game where they take turns representing numbers using base ten blocks and guessing each other’s numbers. - Provide additional worksheets or online activities for students to practice representing numbers up to 50 using tens and ones.