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A guide by Dan on solving the 3x3x3 Rubik's Cube, using standard Western (WCA) notation. It covers the Beginner Method in full and an intermediate approach to CFOP, with sections on solving speed, notation and core methods.
RubiksTrainer is a site for learning to solve the Rubik's Cube, with practice solutions, algorithms, a solver, formula, timer and speedcubing material. It covers beginner and advanced sections, 3x3 algorithms, recognition practice, OLL, PLL, COLL, a timer, and a scrambler for Cross and F2L practice. The site notes a forthcoming move to another address.
A site with lists of heads of state and heads of government of all countries and territories, generally back to about 1700, plus subdivisions, international organizations and foreign ministers. Birth and death years are given, with asterisks marking uncertain dates.
Runestone Interactive provides educational videos, lessons, tutorials, or self-learning resources.
Anatoly Zak is an author, journalist and illustrator, described as the author of Russia in Space. The account lists clients including Popular Mechanics, Aviation Week, Air & Space Smithsonian and Aerospace America, and is associated with RussianSpaceWeb.com.
Sabaki is a cross-platform Go/Baduk/Weiqi board and SGF editor built with web technology based on Electron. It is free and open source. It offers SGF editing tools, SGF game containers, a scoring tool with area or territory counting, a game tree, fuzzy stone placement and support for GTP engines such as GNU Go and Pachi.
Sabin is a YouTube video, playlist, or channel resource for watching related tutorials or media.
Samples provides educational videos, lessons, tutorials, or self-learning resources.
Sanskrit Studio is a blog offering video lessons and articles on Sanskrit grammar, including sentence construction, pronunciation and spelling in roman transliteration and Devanagari. It publishes downloadable exercise and answer sheets as PDFs next to some exercise videos, and articles on usage of individual Sanskrit words.
Sat DB provides educational videos, lessons, tutorials, or self-learning resources.
A page listing suggested reading materials for preparing for the reading section of the SAT. It names newspapers and magazines, fiction and science authors, historical documents and figures, and links to public-domain texts.
SAT Slayer is a free SAT question bank with over 3,000 real SAT questions. Users can create custom practice tests, practice by skill, track progress and review mistakes. The site reports no ads, no paywall and no account required.
SATArchive provides educational videos, lessons, tutorials, or self-learning resources.
SAT Slayer is a free SAT question bank with over 3,000 real questions covering Reading & Writing and Math. It offers custom practice tests, practice by skill, progress tracking, and mistake review, with no ads, paywall, or account required.
SaveMyExams provides educational videos, lessons, tutorials, or self-learning resources.
Scholarship Roar is an education resource platform that aggregates verified worldwide scholarships and internships for students. It offers 2027 fully funded opportunity listings, application guides, and country-specific scholarship information curated by PhD researchers.
School Yourself provides free interactive online math lessons and videos. Subjects include algebra, geometry, trigonometry, precalculus and calculus. The site states the lessons are free with unlimited access, and describes smart recommendations and personalized assessments.
SciArena provides educational videos, lessons, tutorials, or self-learning resources.
Scid vs. PC is a chess toolkit derived from Shane's Chess Information Database that lets users create large databases, run chess engines, and play casual games against the computer or on the Free Internet Chess Server. It began as bug fixes for Scid's computer-versus-player features and has grown into a broader alternative with new interfaces.
ScienceGeek.net is the website of Andy Allan, a retired science teacher in Visalia, California. It provides resources supporting high school science courses, including chemistry, AP Chemistry, and biology, such as notes, worksheets, labs, PowerPoints, and interactive review activities.
Scolary is a platform that helps users discover the best scientific research tools for their workflow. It curates a comprehensive list of tools, providing descriptions and categories to save time and improve research efficiency. Users can explore tools across various disciplines and find software for daily scientific work.
ScoreCloud music notation software instantly turns your songs into sheet music. Users write and arrange music by playing into notation using Audio or MIDI. The Songwriter version is designed to turn recordings of voice and instruments into lead sheets with melody, lyrics and chords.
Scribbr Citation Generator is a free tool that generates citations in APA, MLA, Chicago, and Harvard academic styles. It supports autocite by title, URL, DOI or ISBN, export to Word and Bib(La)TeX, custom font options, annotated bibliography generation, and secure automatic backup of user work. It is built using CSL citation technology and is available as a free Chrome extension.
Scrible is a modern research and writing platform for school and work. It allows users to save, manage, annotate, and share web content. Features include cloud storage of bookmarks and files, a searchable library with tags, in-browser annotation, and sharing of annotated articles. A Chrome extension and Google sign-in are available.
