# Binary search

In this lesson, learners are introduced to binary search, the second and final searching algorithm they need to know about. They will go over the steps of carrying out a binary search and perform a binary search with playing cards and with a sample of data.

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

- Click "Close Video"
- Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

# Lesson summary: Binary search

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The next lesson in Algorithms is "Comparing searching algorithms"