Sharing Instructor Screen with the Class

Sharing Instructor Screen with the Class


When a class is started, the instructor has the ability to broadcast their screen to the student devices. The instructor can choose to share their entire screen with the class, only an application window or a specific browser tab.

This is a great way to demonstrate a lesson or present to students directly on their screens rather than on a projector or smart display in the front of the classroom.

Watch this quick video demonstration of how to use share screen in LanSchool Air:

Starting a Screen Share

  1. Start a class.
  2. Click the Share Screen  button in the classroom toolbar. A window will appear asking what the instructor wants to share:
    1. An entire screen
    2. A single application window
    3. A single browser tab
  3. Select an option and click the Share button.
The instructor will be notified that their screen is currently being shared and a small preview window will appear in the lower right corner of the screen.

Any sound or other audio playing on the instructor's device will not be broadcast to students.
If the chat sidebar was open prior to enabling screen sharing, it will be minimized to ensure that any conversations are not shared accidentally. The chat sidebar can be re-opened anytime, even while sharing the screen.

What do students see?

As soon as sharing begins, a window will appear on all student devices in the class showing both the instructor's shared screen and the option to chat or raise hand.

Locking Students into Viewing Full Screen

Enabling Full Screen sharing when starting a broadcast is a great way to make sure the window is front and center on student devices.
By default, students can minimize or re-size the window where the instructor's screen is being displayed. To change this behavior and lock students into the broadcast, the instructor can enable Full Screen sharing.
  1. While sharing, toggle the "Full Screen" option to the right to enable it
  2. The window on the students' devices containing the broadcasted screen will enlarge to take up the entire screen. Students will be unable to resize or close the window, but will still be able to chat or raise hand.
  3. Toggling the Full Screen option off will allow students to minimize or re-size the broadcast window again.

Stopping a Screen Share

  1. While sharing their screen, the instructor can click the "Stop Sharing" button in the lower right corner of the screen to stop broadcasting to students.

  2. On the student devices, the broadcast will stop and the window will be reduced to only the LanSchool chat dialog.

Troubleshooting Share Screen

Possible Error Messages

During periods of high activity, you may see an error message that says "we are unable to start your screen share. Please retry and if the issue persists, contact support.

If this occurs, please close the error message and try sharing your screen again after waiting 90 seconds. If the error message persists after several attempts, please click on Conference Details   in the toolbar and provide the share screen debug information to the LanSchool Air Support Team

Enable Screen Recording Permission on macOS 10.15+

If running macOS 10.15 (Catalina) or later, you may need to enable the Screen Recording permission for your browser. 
  1. On the instructor's Mac device, navigate to System Preferences 
  2. Select Security & Privacy
  3. In the Screen Recording section, check the box next to Google Chrome (or whichever browser LanSchool Air is using).
  4. Select "Quit Now" when prompted to close the browser and restart it.

Check your network firewall or content filter

LanSchool Air may require that your IT staff allow additional websites through your network's firewall, proxy, or content filter in order for Screen Share to work properly. Please share the following information with them:

Site Addresses / IP Ranges
*  - - - - -

TCP 443, 3478
UDP 443, 3478
TCP 5349
TCP 20,000 - 40,000
UDP 10,000 - 60,000

    • Related Articles

    • Using the Class Toolbar

      Overview The Class Toolbar is present on class screens. If a class has been entered but not started, the Class Toolbar shows a green START CLASS button. Active-class only functions, Push Website Blank Screen, Limit Web, Snapshot, and Share Instructor ...
    • Teacher FAQ

      LanSchool Air - Frequently Asked Questions (FAQ) Managing Classes What if a teacher forgets to end a class? Will the class session time out? A class session will end when the teacher selects "Exit Class" or signs out of LanSchool Air. After two hours ...
    • Creating and Managing Class Rosters Manually

      Overview Classes can be created manually, or they can be imported. If you plan to import classes, the method to use depends on method the LanSchool Air site administrator selected. For more information, see: Syncing and Unsyncing Classes from Google ...
    • Using Device Carts

      Overview Device carts are class rosters, created by an admin, that contain a group of devices. These devices are typically Windows or Mac devices that belong to a physical cart or physical classroom like a computer lab. It is not recommended to build ...
    • Using Class Group View

      Overview Switching to Group View allows instructors to position student screens in a way aligns with how they manage the classroom. For example, an instructor might group students together that need to managed more closely. Another group might ...
    • Popular Articles

    • Viewing Student Client Status

      Overview If a student device is appearing as offline, check the status of LanSchool Air client installed on the student's device to make sure it's provisioned and connected. This will provide direction on where to begin troubleshooting. Viewing ...
    • Using Web Limiting

      Overview To block troublesome or distracting websites or limit students to a select few websites pertinent to the class, use the Web Limiting feature in LanSchool Air. There is currently no limit on the number of URLs that can be added to the block ...
    • Mass Deploying LanSchool Air for Chromebook Student

      This guide walks site administrators through the process of deploying the LanSchool Air app to students using Chromebooks and getting LanSchool Air ready for instructors to use. For information on installing the LanSchool Air app to Windows or Mac ...
    • Controlling Student Browser Tabs

      Overview Controlling browser tabs is currently supported for students using Chromebooks. Students on Windows or macOS devices will only display the most recently viewed website. In List View and Student Details, you have added controls over tabs on a ...
    • Using Blank Screen

      Overview LanSchool Air's customizable Blank Screen feature enables you to push a Blank Screen to your students' computers. When you enable Blank Screen, students are not able to view or listen to anything on their device until the Blank Screen is ...
    • Recent Articles

    • End of Life Lenovo V2 VR Integration with LanSchool Air

      As of March 31, 2024 Lenovo V2 VR integration with LanSchool Air has reached End of Life. Please see Lenovo VR Classroom for more information about VR learning solutions.
    • Viewing Web History

      Overview LanSchool Air preserves a 45 day record of student web history. This record can help instructors keep track of what sites students are using and if they are remaining on task. Web history can be viewed by Instructors and co-teachers in the ...
    • Disabling Edge Split Screen

      Overview LanSchool Air is unable to limit the web in Microsoft Edge when the student uses the Edge Split Screen feature. The LanSchool Air extension does not register the second screen and will not block the website. It is recommended to disable Edge ...
    • Resolving Installer Download Issues for LanSchool Air

      Overview This article serves as a supplementary guide to the articles Installing LanSchool Air for Windows Student and Installing LanSchool Air for Mac Student. If you encounter challenges during the download process on the student machine, ...
    • Accessing Chat History

      Overview Chat history preserves a 45 day record of interactions between students and instructors. This record can be valuable for administrative purposes, tracking student progress or addressing any concerns. Chat history allows LanSchool Air admins ...