> ## Documentation Index
> Fetch the complete documentation index at: https://docs.goguardian.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Student Screen Shows No Active Tab

> What causes the 'No Active Tab' status in GoGuardian Teacher and how to resolve it.

The **No Active Tab** status means the student is connected to GoGuardian services, but GoGuardian Teacher can't capture any screen data. There are 2 common causes.

## Cause 1: No Browser Window Open

The student doesn't currently have a browser window open, or isn't actively on a website or webpage.

**Resolution:** Wait for the student to open a website, or use the Open Tab command to open one for them. Screen data populates once they begin using their browser.

<img src="https://mintcdn.com/goguardian/FVKUrnWRnACRmEDK/images/screenshots/no-active-tab/step-01.png?fit=max&auto=format&n=FVKUrnWRnACRmEDK&q=85&s=6b97d1dcc17575ea056e13d79bbaaead" alt="Student's tile displaying the 'No Active Tab' message and a neutral face emoji" width="253" height="186" data-path="images/screenshots/no-active-tab/step-01.png" />

## Cause 2: Student Is Using a Non-Browser App

The student is using an app or extension that runs outside of the web browser rather than using their browser to view a website.

**Resolution:** Due to limitations of Chrome APIs used in GoGuardian Teacher, Teacher classroom sessions can't view some third-party apps from the Chrome Web Store. Ask the student to switch to a browser-based activity.

<CardGroup cols={2}>
  <Card title="Commands Overview" href="/products/teacher/commands-overview">
    Learn about available Teacher commands, including Open Tab.
  </Card>

  <Card title="Student Offline" href="/products/teacher/student-offline">
    Troubleshoot students who appear offline in your classroom.
  </Card>

  <Card title="Waiting for Activity" href="/products/teacher/waiting-for-activity">
    Understand the Waiting for Activity status in Teacher.
  </Card>

  <Card title="Active Screens View" href="/products/teacher/active-screens-view">
    See how to use the Active Screens view during a session.
  </Card>
</CardGroup>