| Platform | Free Access? | Notes | | :--- | :--- | :--- | | | Yes (with ads) | Flashcard sets, study guides, practice tests. | | Khan Academy | Completely free | Video lessons and practice for math, science, humanities. | | OpenStax | Free textbooks | Peer-reviewed, open-license textbooks. | | Library Genesis | Free (legal gray area) | Textbooks and academic papers, but check your local laws. | | Google Scholar | Free | Find open-access PDFs of academic papers. | | Reddit (r/college) | Free | Ask peers for notes or help on specific topics. |

. Typically, uploading 10 documents earns you a set number of free "unlocks". Export Tools:

Some course-level materials on College Sidekick allow for generating bulk exports in formats for offline use. Using Third-Party Downloader Tools

College Sidekick typically requires users to either upload their own study materials to earn "unlocks" or pay for a premium subscription to download files directly.