Your Toolkit for Acing Online Courses: The 7 Best Study Materials for Online Learners
Let’s be honest for a second. Signing up for an online course on Coursera, Udemy, or Skillshare is the easy part. You get that rush of excitement, you download the syllabus, and then… reality hits. The lectures are long, the discussion forums feel like ghost towns, and you realize you’re staring at a PDF that’s 200 pages long with zero highlighting.
You don’t just need content—you need the best study materials that actually help you retain that content. Whether you’re cramming for a certification, building a new skill, or working toward a degree, the tools you use can make the difference between dropping out and crushing it. I’ve tested dozens of resources over the last year, and I’m sharing the seven that genuinely moved the needle for me. No fluff, no gimmicks—just real tools that work for online learners.
1. Quizlet Plus – The Gold Standard for Active Recall
Short pitch: If you’ve ever tried to memorize a stack of terms for a certification exam, you already know the pain. Quizlet turns that pain into a game. The free version is good, but Quizlet Plus is where the magic happens for serious online learners.
Key Features
- AI-powered Q-Chat: This is not your grandma’s flashcard app. You can type a question like “Explain the concept of variable scope in Python,” and the AI generates a response based on your specific study set. It’s like having a patient tutor at 2 a.m.
- Learn mode with spaced repetition: The algorithm tracks which cards you struggle with and shows them more often. Perfect for preparing for CompTIA, PMP, or CFA exams.
- Upload your own materials: Import notes, PDFs, or even a syllabus. Quizlet turns them into flashcards in seconds.
- Offline access: Download your sets for subway commutes or airplane rides.
What’s the catch?
The free tier is ad-heavy, and the voice-to-text can be glitchy. But the subscription—roughly $35 per year—pays for itself after the first exam you pass.
Final take: If you learn by repetition and testing yourself, Quizlet Plus is the single best study material investment you can make for any online course that has a memorization component.
2. Notion – The Ultimate Course Dashboard
Short pitch: Most online learners drown in tabs. You’ve got lecture notes in Google Docs, deadlines in a calendar app, and separate to-do lists. Notion brings everything under one roof. It’s not a “study tool” in the traditional sense—it’s a command center for your learning journey.
Key Features
- Customizable templates: You can build a “Course Tracker” that includes a calendar, a notes database, and a progress bar. Pre-built templates (like the “Student Dashboard” from the Notion community) are free.
- Database linking: Tag a note with “Coursera – Data Science,” and it automatically appears in your master course list. No more searching.
- Embed anything: Add YouTube lectures, PDF files, or even a Google Sheet inside your notes.
- Collaboration: Share a page with a study group. Everyone can edit in real-time, and you can leave comments on specific paragraphs.
What’s the catch?
There’s a learning curve. The first week feels like assembling IKEA furniture without instructions. But once you set it up, you never look back. The free plan is generous (unlimited pages for individuals), and the Plus plan ($4/month) adds unlimited file uploads.
Final take: Notion is the best study material for online learners who need organization more than anything else. Use it to plan your weeks, store your notes, and keep track of deadlines.
3. Readwise Reader – Save Every Highlight, Forever
Short pitch: You read articles, PDFs, and lecture transcripts while learning online. Then you forget 90% of what you read. Readwise Reader solves that by becoming your external brain. It saves every highlight you make, syncs them across devices, and reviews them at intervals.
Key Features
- Universal highlight: Highlight on your phone, tablet, or computer. It syncs instantly. You can even email articles to your Reader inbox.
- Spaced repetition for reading: The app creates a daily “review” of your best highlights. You see them again after 1 day, 3 days, 1 week, and so on.
- Integration with learning platforms: Send your PDF from Coursera or EdX directly to Reader. It converts it into a readable format with proper text.
- Ghost reader mode: For long PDFs, Readwise can read the text aloud in a natural AI voice. Great for passive review while cooking.
What’s the catch?
It’s a paid tool ($4.99/month or $49.99/year), but the free trial is 30 days. If you don’t highlight, you won’t use it—so this only works if you’re already in the habit of marking up texts.
Final take: For online learners who consume a lot of reading material (research papers, long-form articles, textbook PDFs), Readwise Reader is the best study material for turning passive reading into active learning.
4. Obsidian – The Best Note-Taking App for Deep Learning
Short pitch: Most note-taking apps treat notes as isolated islands. Obsidian treats them as a connected web. When you study a complex subject (think machine learning, philosophy, or project management), concepts overlap. Obsidian lets you link notes together, creating a “second brain” that mirrors how you actually think.
Key Features
- Backlinks: Every time you type
[[course-notes]], it creates a link to another note. Over time, you build a graph of connected ideas. This is gold for interdisciplinary learners. - Local files: Your notes are stored on your computer as plain Markdown files. No vendor lock-in. If Obsidian shuts down, your notes survive.
- Plugins for learning: Install the “Spaced Repetition” plugin to turn your notes into flashcards. Or the “Excalidraw” plugin for drawing diagrams.
- Graph view: Visualize how your course topics relate. It sounds nerdy, but it helps you “see” the structure of a subject.
What’s the catch?
Obsidian is powerful, but it feels like a blank slate. You have to invest time setting up your system. Also, syncing between devices requires their paid Sync service ($5/month) or a workaround using iCloud/Dropbox.
Final take: If you’re the type of online learner who loves to connect ideas across multiple courses (and you’re willing to spend an afternoon learning the tool), Obsidian is the best study material for building long-term knowledge.
5. Skillshare – The Best Platform for Project-Based Learning Materials
Short pitch: Yes, Skillshare is an online learning platform, but it also offers something unique: downloadable “class project” materials that function as stand-alone study aids. Many instructors provide PDF templates, cheat sheets, and resource lists that you can use even after the subscription ends.
Key Features
- Class projects: Each class includes a “project” that you complete. The instructor often provides a starter file (e.g., a Photoshop template, a Notion doc, a spreadsheet). You learn by doing, not just watching.
- Downloadable resources: You can download the project files and use them as templates for your own work. For example, a “Productivity Masterclass” might give you a daily planner PDF.
- Community feedback: Post your completed project, and other learners (and sometimes the instructor) give feedback. This is a hidden learning material—peer review.
- Wide range: From illustration to marketing to design, the project files are practical and ready to use.
What’s the catch?
Skillshare’s annual plan ($168/year) is not cheap, but they often have free trials for 30 days. The depth of courses varies wildly—some are 10 minutes, others are 10 hours. Stick to classes with high ratings and project visibility.
Final take: For visual and hands-on learners, the downloadable project files from Skillshare are some of the best study materials you can get. They turn theory into actual output.
6. Chegg Study – Your Textbook’s Best Friend (When You’re Stuck)
Short pitch: Online courses often use thick textbooks (think calculus, economics, nursing). Chegg Study provides step-by-step solutions to textbook problems. When you’re stuck on a practice question at 11:00 PM, Chegg is the lifeline that keeps you moving.
Key Features
- Step-by-step solutions: Search your textbook title and problem number. You get a detailed explanation, not just an answer.
- Expert Q&A: Take a photo of a problem you can’t find in the database. A subject expert answers within a few hours (usually less).
- Flashcards: Pre-built flashcard sets for popular textbooks and standardized tests (SAT, GRE, NCLEX).
- Grammar and citation help: For essay-heavy courses, Chegg’s writing tools check for plagiarism and formatting.
What’s the catch?
Chegg is a subscription service ($15.95/month). Some students misuse it to copy answers rather than learn—but if you use it ethically (check your work after trying), it’s a powerful study accelerator. Also, the expert Q&A can be slow on weekends.
Final take: For learners taking quantitative or science-heavy online courses, Chegg Study is one of the best study materials for getting unstuck quickly. Use it as a tutor, not a shortcut.
7. Krisp AI – The Invisible Study Environment
Short pitch: This might seem odd for a “study materials” list, but hear me out. Online learning requires focus. Krisp is an AI noise-cancellation app that runs in the background and removes background noise from your computer’s microphone AND speakers. It turns a noisy coffee shop into a silent library.
Key Features
- Two-way noise cancellation: It removes noise from both incoming audio (your lecture) and outgoing audio (your mic for study groups).
- Works on any app: Use it with Zoom, Google Meet, YouTube, or even a recorded lecture on VLC. It works system-wide.
- Focus mode: A built-in timer with ambient sounds (rain, forest, coffee shop) to help you get into “study flow.”
- Transcription: It can generate a text transcript of your lectures in real-time. You can search the transcript later for specific terms.
What’s the catch?
The free tier gives you 60 minutes of noise cancellation per day. For unlimited use, it’s $8/month. If you study mostly in a quiet home, you won’t need it. But for remote learners with roommates, kids, or noisy surroundings, it’s a game-changer.
Final take: Krisp AI is the best study material for online learners who struggle with focus due to environment. It’s not a “material” in the traditional sense, but it directly improves your ability to absorb lecture content.
Buying Guide: How to Choose the Right Study Materials for Your Situation
Every learner is different. Here’s a quick cheat sheet to match your learning style with the best study material:
If you’re taking a certification exam (CompTIA, PMP, AWS, CFA…)
Go with Quizlet Plus for flashcards and spaced repetition. Pair it with Chegg Study if there’s a heavy math component. You need active recall, not passive reading.
If you’re learning a creative skill (design, video editing, writing…)
Skillshare is your best bet for project-based learning materials. Download the class files and use Notion to track your portfolio pieces.
If you’re a heavy reader (humanities, law, research…)
Readwise Reader and Obsidian form a powerhouse duo. Save your highlights in Reader, then link them together in Obsidian. You’ll build a knowledge graph over time.
If you’re easily distracted or study in chaotic environments
Invest in Krisp AI first. It’s the cheapest way to dramatically improve focus. Then, use Notion to plan short study sprints.
Budget considerations
- Free only: Notion (free plan) + Obsidian (free) + Quizlet free tier. You lose some features but still get a solid system.
- Low investment ($5–$10/month): Readwise Reader ($5) + Krisp AI ($8).
- Full stack ($15–$30/month): Quizlet Plus ($3) + Skillshare ($14) + Chegg ($16). You’ll have every base covered.
Final Thoughts: Build Your System, Don’t Just Collect Tools
Here’s the truth: having the best study materials in the world won’t help if you don’t use them consistently. The learners who succeed online aren’t the ones with the most apps—they’re the ones who build a simple system and stick to it. Start with one tool from this list (I’d recommend either Quizlet Plus or Notion), master it, and then add another.
Online learning is lonely, but the right materials make it feel less like a solo grind and more like a well-guided journey. You’ve got this. Now go open that course.
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What’s your go-to study material for online courses? Drop a comment below—I’d love to hear what’s working for you. And if you found this guide useful, share it with a friend who’s drowning in a Coursera specialization right now.