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Computer Science - 3rd

Exploring the World of Computers

Title: Exploring the World of Computers

Compliance: Common Core State Standards for Mathematics and English Language Arts

Subject: Computer Science

Summary: Engage your third-grade students in a hands-on activity that introduces them to the world of computers and coding.

Topic: Introduction to Computers and Coding

Learning Outcomes:

  • Know the basic components of a computer system
  • Understand the concept of coding and its importance
  • Can create simple programs using block-based coding


This activity will be conducted in a group setting, allowing students to collaborate and learn from each other. It will involve a combination of hands-on exploration, discussions, and interactive coding exercises.


  • Computers or tablets with internet access
  • Scratch Jr. or similar block-based coding software
  • Printed worksheets and activity sheets
  • Markers, crayons, and colored pencils


Step 1: Introduction to Computers

Begin the activity by discussing the basic components of a computer system, such as the monitor, keyboard, mouse, and CPU. Show examples of each component and explain their functions.

Step 2: Importance of Coding

Engage the students in a discussion about coding and its importance in today's world. Explain how coding is used to create computer programs and apps.

Step 3: Exploring Block-Based Coding

Introduce the students to block-based coding using Scratch Jr. or a similar software. Demonstrate how to drag and drop blocks to create simple programs.

Step 4: Hands-On Coding Activity

Provide each student with a printed worksheet containing a simple coding challenge. Instruct them to use the block-based coding software to solve the challenge.

Step 5: Sharing and Reflection

Allow students to share their coded programs with the class. Encourage them to explain their thought process and any challenges they faced.

Step 6: Extension Activity

For students who finish early, provide additional coding challenges or allow them to explore other coding resources online.


Assess the students' understanding of the topic through observation during the hands-on coding activity and their ability to explain their programs. You can also collect their printed worksheets to review their solutions.

By the end of this activity, students should have a basic understanding of computers, coding, and be able to create simple programs using block-based coding.

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10 months ago
Common Core State Standards for Mathematics and English Language Arts

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