In 2025, AI-powered Chrome extensions are revolutionizing how teachers manage classrooms, plan lessons, and engage students. These tools save time, boost productivity, and enhance teaching methods, making them essential for educators navigating the demands of modern education. Below, we’ve curated the top 10 AI extensions for teachers, focusing on lesson planning, grading, feedback, and classroom management. Each is either free or offers a functional free tier, ensuring accessibility for all educators.
1. Brisk Teaching
Brisk Teaching is a free Chrome extension designed for educators, streamlining tasks like lesson planning, grading, and differentiation. It integrates seamlessly with tools like Google Docs and PDFs, making it a top choice for teachers.
Key Features:
- Generates quizzes and lesson plans from web pages or PDFs.
- Adjusts reading levels for student accessibility.
- Provides AI-safe feedback and grading tools.
- Free for teachers, with premium school plans available.
Best For: Quick resource creation and grading.
2. Merlin
Merlin leverages OpenAI’s ChatGPT to provide instant AI assistance across websites, from drafting emails to summarizing YouTube videos. It’s a versatile extension for teachers needing quick content or communication support.
Key Features:
- Summarizes Google searches and YouTube videos.
- Drafts email replies with customizable tones.
- Free with no login required; paid plans ($15-$70/month) for advanced use.
- Accessible via Cmd+M (or Ctrl+M) on any site.
Best For: Research and communication.
3. Plus AI for Slides
Plus AI transforms lesson planning by creating Google Slides presentations in seconds, making it ideal for teachers needing polished visuals fast.
Key Features:
- Generates full presentations from text prompts or topics.
- Customizes slides with AI-driven layouts and graphics.
- Free tier available; paid plans ($10-$20/month) for premium features.
- Integrates directly with Google Slides.
Best For: Presentation creation.
4. NotebookLM Extension
Google’s NotebookLM is an AI-powered research tool that organizes notes and generates summaries, handouts, or lesson plans from uploaded files or web links.
Key Features:
- Creates study guides, quizzes, or discussion prompts.
- Summarizes complex texts or videos.
- Free for educators with a Google account.
- Supports collaborative project management.
Best For: Research and content organization.
5. Twee AI
Twee AI, built for educators, generates English lesson content like reading comprehension questions, vocabulary exercises, and interactive slides from YouTube videos or topics.
Key Features:
- Creates quizzes, dialogues, and essay prompts.
- Summarizes YouTube videos with interactive questions.
- Free for basic use; Pro at $36/month for unlimited words.
- Adaptable for non-English subjects.
Best For: English and language arts lessons.
6. Shiken AI
Shiken turns notes, PDFs, or links into quizzes, courses, or AI roleplays, offering teachers a dynamic way to create interactive content.
Key Features:
- Generates quizzes and roleplay scenarios from any material.
- Free tier with limited generations; paid plans vary.
- Supports interactive student engagement.
- Works with web-based or uploaded content.
Best For: Interactive assessments.
7. Kami AI
Kami’s Chrome extension enhances document annotation with AI-driven features, allowing teachers to provide feedback and create interactive assignments.
Key Features:
- AI-assisted feedback on student work.
- Free basic plan; teacher plan ($99/year) for advanced tools.
- Integrates with Google Classroom and Canvas.
- Supports audio and video annotations.
Best For: Document-based feedback.
8. Magic Padlet
Magic Padlet uses AI to streamline content creation on digital boards, helping teachers organize lessons and foster collaboration.
Key Features:
- Generates ideas and organizes visual content.
- Free with Padlet’s basic plan; premium for schools.
- Supports polls, mind maps, and student contributions.
- Enhances classroom brainstorming.
Best For: Collaborative projects.
9. Snorkl
Snorkl is an AI extension that provides real-time feedback on student writing, adjusting to individual learning needs. It’s a teacher favorite for personalized support.
Key Features:
- Analyzes and grades writing with tailored feedback.
- Free for basic use; premium features via school plans.
- Integrates with Google Docs and Classroom.
- Tracks student progress over time.
Best For: Writing feedback.
10. TeachMateAI
TeachMateAI offers a suite of AI tools within a Chrome extension, including lesson plan generators, quiz creators, and email drafters tailored for educators.
Key Features:
- Creates customized lesson plans and assessments.
- Free tier with limited features; paid plans ($10-$20/month).
- Simplifies administrative tasks like parent communication.
- User-friendly for all grade levels.
Best For: Administrative efficiency.
How to Choose the Right AI Extension for Teaching
Selecting the best extension depends on your needs:
- Lesson Planning: Brisk Teaching, Plus AI, or TeachMateAI.
- Grading and Feedback: Snorkl or Kami AI.
- Student Engagement: Shiken AI or Magic Padlet.
- Research and Content: Merlin or NotebookLM.
Test free tiers to evaluate usability and integration with tools like Google Classroom. Ensure extensions comply with school privacy policies, especially for student data.