Buyer's guide
Best Chrome Extensions for Schoology in 2026
Buyer's guide
Best Chrome Extensions for Schoology in 2026
On this page
- The short answer
- Which Chrome extensions actually work with Schoology?
- What are the best Schoology extensions right now?
- How do you annotate Schoology PDFs with Kami?
- Which dictionary extension is best for Schoology readings?
- What about Schoology Plus and other Schoology-only extensions?
- Can you install Schoology extensions on a school Chromebook?
- Which Chrome features help with Schoology without an extension?
- Why isn't an extension working on Schoology?
- Frequently asked
The short answer
The Chrome extensions that help most in Schoology are general classroom tools, not Schoology add-ons: Kami for annotating PDFs and worksheets, plus a pop-up dictionary such as Definer, Cambridge Dictionary or Mouse Dictionary for readings. Many LMS extensions only support Canvas, so confirm a listing names Schoology before you install it.
Which Chrome extensions actually work with Schoology?
The reliable ones are extensions that work on any web page or any PDF, because Schoology is an ordinary website running in Chrome. Annotation tools and pop-up dictionaries fit that description; most course-specific LMS helpers do not.
That distinction trips up a lot of students. Search the Chrome Web Store for learning-platform tools and you will find to-do sidebars, file downloaders and grade trackers, but read the descriptions and most are written for Canvas, Blackboard or D2L Brightspace. They look for those platforms' page structure and do nothing on Schoology.
Schoology, now part of PowerSchool, has a smaller dedicated extension ecosystem. So this guide splits the options into three groups: general tools that work inside Schoology today, Schoology-specific projects to evaluate carefully, and Chrome's own built-in features that cover several jobs without installing anything.
Check your school's rules first
Teachers can set quizzes and tests that restrict outside tools, and school policies on dictionaries, translators and AI explanations vary. An extension that is fine for homework may not be allowed during an assessment.
What are the best Schoology extensions right now?
For most students, install one annotation tool and one dictionary, and stop there. Each extra extension adds permissions and another thing that can break when Schoology updates its pages.
| Extension | Best for | Price | How it works in Schoology |
|---|---|---|---|
| Kami | Marking up PDFs and worksheets | Freemium | Opens PDF attachments for annotation; LMS integration if your school enables it |
| Definer | Definitions, translation and AI explanations | Freemium | Select any word or phrase on a Schoology page |
| Cambridge Dictionary | Learner-friendly definitions | Free | Pop-up or hotkey lookup across 30+ Cambridge dictionaries |
| Mouse Dictionary | Language learners who read a lot | Free | Hover pop-up, highly customisable |
| Merriam-Webster Lookup | Quick plain-English definitions | Free | Pop-up definitions while browsing |
Our Schoology picks
-
KamiFreemium
Education
The strongest fit for worksheet-heavy classes: annotate, highlight and write on PDFs. Catch: some tools and integrations depend on a paid or school plan.
-
DefinerFreemium
Education
Does definitions, translations and AI explanations from one selection. Catch: AI explanations may not be allowed by every teacher, and advanced features are freemium.
-
Education
Clear learner definitions with a popup or hotkey. Catch: definitions only, no annotation or notes.
-
Mouse DictionaryFree
Education
Fast hover lookups tuned for language learners. Catch: the customisation takes a few minutes to set up.
-
Education
Simple pop-up English definitions. Catch: the listing describes Merriam-Webster style definitions, so do not assume it is an official Merriam-Webster product.
You can browse more options in our education extensions category, and the criteria behind every pick are on our methodology page.
How do you annotate Schoology PDFs with Kami?
Open the PDF from Schoology in its own Chrome tab, open it in Kami, annotate, then export and upload the result as your submission. If your school has turned on Kami's Schoology integration, your teacher may send the file straight to Kami instead.
- Install Kami from the Chrome Web Store and sign in with your school Google or Microsoft account if your school uses one.
- In Schoology, open the assignment and click the attached PDF. If it opens in Schoology's built-in viewer, use the download or open-in-new-tab option so Chrome shows the file directly.
- Click the Kami icon in the toolbar (pin it via the puzzle-piece
Extensionsmenu) to open the current PDF in Kami. - Mark it up with the highlight, text, drawing and comment tools.
- Use Kami's export or download option to save the annotated file to your computer or Google Drive.
- Back in Schoology, open the assignment, click
Submit Assignment(the label on most setups), choose the upload option and attach the exported PDF.
Kami lists Schoology among the platforms it integrates with on the Kami website, but whether that integration is available to you is a decision for your school's admin, not something the extension can switch on. If you only have the extension, the download-and-upload route above always works.
Keep the original file
Save the untouched PDF before annotating. If an export goes wrong the night before a deadline, you can start again without asking your teacher to re-share the worksheet.
Which dictionary extension is best for Schoology readings?
Pick Cambridge Dictionary for clear learner definitions, Definer if you also want translation and explanations, and Mouse Dictionary if you are reading in a second language and want instant hover lookups. All three work on Schoology discussion posts, pages and text resources because they act on any selectable text.
- Cambridge Dictionary
- Popup or hotkey lookups across more than 30 Cambridge dictionaries. The safest choice for English learners and for teachers who approve dictionary use but not AI.
- Definer
- Select text to get a definition, a translation or an AI explanation. Useful for dense science or history readings; check whether AI explanations are allowed in your class.
- Mouse Dictionary
- A customisable hover pop-up built for language learners. Best when you look up many words per paragraph and do not want to click each one.
- Merriam-Webster Lookup
- Straightforward English definitions in a pop-up. A light option if you only need a meaning now and then.
Set a keyboard shortcut for your dictionary at chrome://extensions/shortcuts so lookups do not need the mouse. Pick a combination such as Alt+Shift+D, and avoid shortcuts Schoology or Chrome already use, like Ctrl+F for find.
Install one dictionary, not three. Several pop-up tools reacting to the same double-click will stack windows over your reading and slow the page.
What about Schoology Plus and other Schoology-only extensions?
Schoology Plus is the best-known extension built specifically for Schoology. It is a student-made, open-source project that has offered custom themes, course icons, quick-access menus and what-if grade calculation; check the Schoology Plus project page for its current status before installing.
Treat any Schoology-only extension with a bit more caution than a general tool. Because it depends on Schoology's page layout, a redesign can break features overnight, and a small project may not ship a fix quickly. It also needs access to your Schoology pages, which include grades and messages.
Canvas tools that will not help on Schoology
If you moved schools, you may have used Tasks for Canvas or Canvas file downloaders. Their descriptions name Canvas, Blackboard or D2L, not Schoology, so they will not read your Schoology assignments. Remove them rather than leaving unused extensions with page access.
- Check that the Web Store description names Schoology explicitly, not just LMS.
- Look at the last-updated date on the listing; long gaps are a warning sign for a site-specific tool.
- Review the site access it requests on our permissions guide before approving.
- Prefer extensions that ask only for Schoology domains over ones that want every site.
Can you install Schoology extensions on a school Chromebook?
Only if your school allows it. School Chromebooks and school Google accounts are usually managed through the Google Admin console, where admins decide which extensions students can install, and many schools pre-install Kami or similar tools for you.
- Open a new tab and go to
chrome://management. If it says your device or browser is managed by your school, admin rules apply. - Try installing from the Chrome Web Store. A greyed-out button or a blocked-by-administrator message means the extension is not on the allowed list.
- Open
chrome://extensionsto see which tools your school already installed; force-installed ones cannot be removed. - If you need a blocked tool for accessibility or language support, ask your teacher or school IT to request it, naming the exact extension.
Do not work around school controls
Using a personal account or another browser to avoid admin rules on a school device can breach acceptable-use policies. On your own laptop with a personal Chrome profile, you are free to install what you like.
On Windows, macOS and personal Chromebooks, install into the profile where you sign in to Schoology. Chrome on Android and iPhone does not support extensions, so on a phone you are limited to the Schoology app and the browser's built-in tools.
Which Chrome features help with Schoology without an extension?
Several jobs students install extensions for are already built into desktop Chrome. Try these first, especially on a locked-down school device where installs are blocked.
- Reading mode: right-click a long Schoology page and choose
Open in reading modeto see the text in the side panel with adjustable font, spacing and read-aloud. - Translate: right-click selected text or the page and choose the translate option to read a resource in your language.
- Live Caption: turn it on in
Settings>Accessibility>Live Captionto caption videos your teacher posts. - Tab groups: right-click a tab and choose
Add tab to new groupto keep each class's resources together. - Reopen closed tabs:
Ctrl+Shift+Ton Windows and ChromeOS,Cmd+Shift+Ton Mac, when you close an assignment by accident. - Separate profiles: a school profile keeps your Schoology login, bookmarks and extensions apart from personal browsing.
Built-in features also avoid the permission question entirely, because nothing new gets access to your Schoology pages.
Why isn't an extension working on Schoology?
Most failures come from embedded viewers, site access settings or admin policy, not from the extension itself. Work through these in order.
| Symptom | Likely cause | Fix |
|---|---|---|
| Dictionary pop-up ignores text in a document | The file is shown inside an embedded viewer frame | Open the file in its own tab, then select the text |
| Kami icon does nothing on a PDF | PDF is inside Schoology's viewer, not Chrome's | Download or open the PDF in a new tab first |
| Extension works elsewhere but not on Schoology | Site access set to on click or specific sites | chrome://extensions > Details > Site access, allow Schoology |
| Shortcut does nothing | Clash with another extension or page shortcut | Reassign it at chrome://extensions/shortcuts |
| Extension missing or disabled | Removed or blocked by school admin | Check chrome://management and ask school IT |
| Worked last week, broken now | Schoology changed its page layout | Update the extension or wait for a fix; site-specific tools break most often |
If a problem persists only in your school profile, try the same page in a guest window on a personal device to tell an extension issue from an account or network restriction. For more tools for class, head back to the blog or the education category.
Extensions mentioned in this guide
- KamiAnnotate PDFs, mark up documents, and collaborate on classwork right in the browser
- DefinerSelect text to get definitions, translations, or AI explanations
- Cambridge DictionaryLook up words in 30+ Cambridge dictionaries via popup or hotkey
- Mouse DictionaryA fast, customizable pop-up dictionary built for language learners
- Merriam-Webster LookupGet clear Merriam-Webster style English definitions while browsing
Frequently asked
Is there a Chrome extension for Schoology?
Yes, but few are Schoology-specific. General tools such as Kami and pop-up dictionaries work inside Schoology, and Schoology Plus is the best-known dedicated project.
Does Kami work with Schoology?
Yes. You can open Schoology PDFs in Kami with the extension, and Kami lists Schoology as an integration your school can enable.
How do I submit a Kami file to Schoology?
Export or download the annotated PDF from Kami, then open the assignment in Schoology, click Submit Assignment and upload the file.
Is Schoology Plus safe to use?
It is an open-source student project, so its code is public. It still needs access to your Schoology pages, so check its current status and permissions first.
Do Canvas extensions work on Schoology?
Usually not. Tools like Tasks for Canvas are built around Canvas, Blackboard or D2L page layouts and do not read Schoology assignments.
What is the best dictionary extension for Schoology?
Cambridge Dictionary for learner-friendly definitions, Definer for translation and explanations, and Mouse Dictionary for fast hover lookups when reading in a second language.
Why can't I add extensions on my school Chromebook?
Your school manages the device through the Google Admin console and limits which extensions students can install. Ask school IT to approve a specific tool.
Can I use Schoology extensions on my phone?
No. Chrome on Android and iPhone does not support extensions, so on mobile you use the Schoology app or the browser's built-in features.
Can teachers see which extensions I use in Schoology?
Schoology itself does not list your extensions, but on a school-managed device or account, admins can see and control what is installed.
Are dictionary extensions allowed during Schoology tests?
That depends on your teacher and school policy. Some assessments restrict outside tools, so ask before using a dictionary or translator in a test.
Is there a free Schoology Chrome extension?
Yes. Cambridge Dictionary, Mouse Dictionary and Merriam-Webster Lookup are free, and Kami and Definer have free tiers.
Why did my Schoology extension suddenly stop working?
Schoology probably changed its page layout, which breaks site-specific tools first. Update the extension, check site access, and see whether your school changed its policy.