Students will be able to identify, write and compare large numbers up to 10,000.

Materials

Large number cards (1-10,000)

Card stock or thin paper

Pencils

Warm-up

Ask students to name the largest number they can think of. Write the number on the board.

Ask for volunteers to add one or two numbers to the number on the board, and write the results on the board.

Review the rules for adding numbers (see Addition Skills lesson plan, or watch this video: https://www.khanacademy.org/math/learn-to-add-and-subtract/add-and-subtract-number-up-to-100).

Direct Instruction

Introduce the concept of a large number by using a large number like 1,000,000 or 1,000,000,000.

Model how to break up the large number into groups of three digits, and how to add those groups together.

Show how to write the resulting number using four digits.

Have students work with a partner to come up with a large number and break it up into groups of three digits. Have them add the groups together and write the result using four digits.

Guided Practice

Have students work with a partner to solve additional problems, such as 10,000 + 100,000 + 1,000,000.

Independent Practice

Have students work on a project-based activity, such as designing and constructing a large number clock to show numbers up to 9,999,999.

Closure

Review the concept of large numbers and how they are written in base-10. Ask students to share their large number clocks and discuss any challenges they faced and solutions they found.

Assessment

Observe students during independent practice to ensure they are able to create large number clocks using base-10 numerals. Collect and review their clocks to assess their understanding of large numbers and the base-10 system.

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