Known widely for its comprehensive study guides for literary works commonly studied in the English classroom, Sparknotes is an absolute essential for studying the all-important humanities subject of literature. Packaged with explanations for characters, themes, motifs, plot points, and many other guides for comprehending major titles, all of its essential content is available with its free access option.

The NYT Learning Network holds contests throughout the school year for teenagers around the world to submit entries, free of charge. It provides writers and journalists a platform to voice their ideas and showcase their writing. Examples of these opportunities include the Editorial, Review, and Summer Reading contests.

Fiveable is a global community of Advanced Placement students which offers virtual study groups and well-curated study guides and content for every single AP exam administered by the College Board. Also providing help for students with many different aspects of the US college admissions process, its services are completely free of charge.

Crash Course is a long-established online course database that extensively covers a wide range of subjects, from astronomy to philosophy to law, history, and science. Their videos are of very high quality, though it is important to note that their content is not specifically aligned with any major high school curriculum.

The SEP is an open-access and authoritative database of philosophical terms. Kept up to date by experts in the field, it maintains stringent standards in its publishing practices and continues to add new terms to this date.

LibGen provides free access to a wide range of journal articles, textbooks, and other forms of media that are mostly otherwise behind a paywall. The ability to download free textbooks is especially helpful to students at locations where resource access is lacking. To prevent downloading unwanted viruses, it is best to avoid torrenting; rather, download files directly from the site.

Coursera’s online courses, largely administered by world-renowned universities and companies, cover all fields of study and allow for many flexible aspects in learning. Its courses vary from simple lecture series to full professional degrees. Though many courses require payment, a large number of high-quality classes are offered free of charge and some paid programs allow for free viewing of content (“auditing”), though without graded assignments.

Edx is a database of courses provided by universities, private companies and even international organizations. From skill-learning such as coding to academic learning such as topology, Edx provides courses for any and all interests. While certification is priced, most courses are available for free.

JSTOR is one of the most well-known databases for academic articles throughout the world. While a significant portion of its content is behind a paywall, free access is an option for over 8.5 million journal articles, making JSTOR a helpful resource for all kinds of research.

Yale Young Global Scholars is a selective two-week summer program hosted by Yale University. Attracting students from around the world, the program prides itself on inclusivity. Need-based financial aid of up to 100% tuition is available.

The most popular global video platform, YouTube has long hosted a substantial community of learners and teachers. With nearly all video content is available free of charge, it is a go-to resource for a student’s questions on any topic.

RemNote is a note-taking application, available on mobile, as a web app, and on desktop, that allows users to create spaced-repetition flashcards within a hierarchic text structure. This functionality takes full advantage of the forgetting curve to optimize memory retention for notes that would otherwise exist in plain text. All of the essentials come with the free version of the app.