If you are a teacher using Google products for teaching from home, Here's list of must have extensions for teachers like you.

How to download and use chrome extensions:

• Visit the chrome web store while using your chrome browser
• Search the chrome extension you’re interested in using, then click “add to chrome” (the download will only take a minute or two)
• You’ll notice a new icon in the top of your screen in the toolbar once the download is complete
• Click the icon that correlates to the extension you want to use in order to activate it. Follow the directions on-screen after clicking the icon in the toolbar. 
• Need more help? Visit the Chrome Web Store Help Desk.

Meet Attendance

Collect attendance in a Google Sheet from a Google Meet.

https://chrome.google.com/webstore/detail/meet-attendance/nenibigflkdikhamlnekfppbganmojlg?hl=en

Kami Extension - PDF and Document Annotation

https://chrome.google.com/webstore/detail/kami-extension-pdf-and-do/ecnphlgnajanjnkcmbpancdjoidceilk

Google Meet Grid View

https://chrome.google.com/webstore/detail/google-meet-grid-view/kklailfgofogmmdlhgmjgenehkjoioip

Nimbus Screenshot & Screen Video Recorder

https://chrome.google.com/webstore/detail/nimbus-screenshot-screen/bpconcjcammlapcogcnnelfmaeghhagj

EquatIO - Math made digital

https://chrome.google.com/webstore/detail/equatio-math-made-digital/hjngolefdpdnooamgdldlkjgmdcmcjnc

Loom for Chrome

Loom, you can record your screen, voice, and face to create an instantly shareable video in less time than it would take to type an email.

https://chrome.google.com/webstore/detail/loom-for-chrome/liecbddmkiiihnedobmlmillhodjkdmb

Dualless

Dualless is a poor man's dual monitor solution. It splits your browser windows into two by just 2 clicks. The ratio can be adjusted according to your needs.You may have a  browser window showing on the right that occupy 30% of your  screen. Then the rest of space leave to Google+. 

https://chrome.google.com/webstore/detail/dualless/bgdpkilkheacbboffppjgceiplijhfpd

Read&Write

Reads docs & websites out loud, dictionary, highlighter, etc

https://chrome.google.com/webstore/detail/readwrite-for-google-chro/inoeonmfapjbbkmdafoankkfajkcphgd

Vidyard - Free Video and Screen Recorder

Capture your screen, share your video and track who's watching it!

Vidyard’s free screen recorder makes it easy to communicate better with video. 

Record and share unlimited videos for customer presentations, employee onboarding, team updates, and more—in just a few clicks.

https://chrome.google.com/webstore/detail/vidyard-free-video-and-sc/jiihcciniecimeajcniapbngjjbonjan

Push to Classroom

Push to Classroom allows teachers to instantly share any link to their Google Classroom classes as an announcement or an assignment. This allows teachers to instantly push links to their students, even if the students aren't currently logged in to Google Chrome.

https://chrome.google.com/webstore/detail/push-to-classroom/jbneakgkpdfcjnolohhnbahjcbkleiji