據 AlphaMoat 統計,截至 2026-09,Chrome 外掛 LessonSide 使用者數為 43,環比 +104.8%,評分 5(4 人評價),在全部 9,324 款 AI 瀏覽器外掛中排名第 5,754 位,在「教育科研」分類(676 款)中排名第 433 位。
LessonSide 是什麼
AI tutor for YouTube lessons: auto study notes, quizzes to test yourself, and screenshot Q&A on the exact frame you're stuck on. LessonSide — Your AI tutor for YouTube lessons
Make every YouTube lesson count. Get auto study notes, and quiz yourself, ask about anything on screen — all while you watch.
🎯 What it does
Auto notes for every lesson. It turns every lesson into organized key points — so you don't have to write anything down.
A quick quiz on what you learned. It verifies you actually understood the lesson — not just watched it. Interactive questions, instant feedback, and a way to spot the gaps.
Something on screen isn't clicking? Screenshot it and ask — understand it without leaving the video. Box a formula, diagram, or line of code and get a clear explanation right where you're watching.
展開其餘商店介紹▾
Ask anything, anytime. Ask about the lesson as you watch and get answers grounded in the video — like having a tutor sitting right next to you.
Works on YouTube and Bilibili video pages.
📖 How to use
Install the extension and open any YouTube lesson. Click the elephant icon at the top-right of your browser to open the side panel. The assistant activates automatically — start asking, or use Notes and Quiz. For the best experience, click Theater Mode at the bottom-right of the player.
💡 Who it's for
Anyone teaching themselves programming, math, AI, or deep learning from YouTube lectures Students studying for exams with online courses Learners following courses from Andrew Ng, 3Blue1Brown, MIT OpenCourseWare, and more Anyone who wants to make every YouTube lesson count
✨ Why LessonSide
Screenshot-to-ask is our standout feature — box a formula, diagram, or line of code and get it explained without leaving the video.
Notes, chat, and quiz in one place — understand, summarize, and verify without switching tools.
Full math rendering (KaTeX) — formulas and STEM content display perfectly.
Built for focus — each video gets its own notes, chat, and quiz, so your study stays organized lesson by lesson.
🔒 Privacy
We only access the video page you're actively watching — we don't track your general browsing.
To provide the tutoring features, we process your email (for login), the video's subtitles, your chat messages, and any screenshots you capture. This data is stored securely and never used for advertising.
Full details — including Google sign-in and third-party AI processing — are in our privacy policy.
Privacy policy: https://lessonside.com/privacy/
📬 Contact: [email protected]
外掛檔案
使用者增長趨勢
「教育科研」分類下的熱門外掛
AI for teachers, right inside Google Docs, Classroom, YouTube, and more. Tell Brisk what you need and save 10+ hours a week.
+ 對比
Your ultimate knowledge and English learning tool to discover the world and upskill yourself. Translate video, websites and PDF.
+ 對比
Bring AI detection, citation checks, live essay feedback, and writing replays directly into Google Docs and your workflow.
+ 對比
Trancy provides bilingual subtitle for platforms like YouTube, Disney+, as well as AI translator for websites.
+ 對比
Automatically import flashcards and notes from any video, PDF, article, or flashcard site. Knowt is the fastest way to study.
+ 對比
Your AI research assistant for understanding scientific literature.
+ 對比資料月份:2026-09 · 使用者數與評分來自 Chrome 應用商店公開資料,按月聚合更新。口徑說明見資料方法。