Mathcha is an educational resource for learning science, history, language, geography, or general knowledge.
ARKAT USA, Inc. publishes ARKIVOC, described as a free journal of organic chemistry. The site lists recent and accepted manuscripts with DOIs and PDF full texts, and offers browse, search and conference sections.
Wolfram MathWorld is a comprehensive encyclopedia of mathematics with 13,000 detailed entries. It is continually updated, extensively illustrated, and includes interactive examples, covering areas such as algebra, geometry, calculus and analysis, and probability and statistics.
Number Academy provides educational lessons, courses, tutorials, or study material for self-learning.
Airfoil Tools provides tools to search, compare and plot airfoils. It includes an airfoil search with filtering by thickness and camber, a plotter, shape comparison, NACA 4 and 5 digit generators, and a Reynolds number calculator. Users can add their own airfoils, but these are stored only in the browser session.
MathPortal is a mathematics website offering step-by-step online calculators and solvers for topics including polynomial equations, rational expressions, systems of equations, matrices, complex numbers and analytic geometry. It also provides math lessons, formulas and tests. The site states it was designed by mathematician Miloš Petrović, who wrote the calculators, lessons and formulas. A paid homework help service is mentioned.
Doc Brown's School Science Revision Notes and Quizzes is a science revision website that began in 2000 as a chemistry site and has since expanded. It offers revision notes and quizzes for biology, chemistry and physics at lower secondary, GCSE, IGCSE and advanced level, keyed to UK exam boards including AQA, Edexcel, OCR, WJEC and CCEA.
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ARKAT USA, Inc. publishes ARKIVOC, described as a free journal of organic chemistry. The site lists recent and accepted manuscripts with DOIs and PDF full texts, and offers browse, search and conference sections.
Wolfram MathWorld is a comprehensive encyclopedia of mathematics with 13,000 detailed entries. It is continually updated, extensively illustrated, and includes interactive examples, covering areas such as algebra, geometry, calculus and analysis, and probability and statistics.
Number Academy provides educational lessons, courses, tutorials, or study material for self-learning.
Airfoil Tools provides tools to search, compare and plot airfoils. It includes an airfoil search with filtering by thickness and camber, a plotter, shape comparison, NACA 4 and 5 digit generators, and a Reynolds number calculator. Users can add their own airfoils, but these are stored only in the browser session.
MathPortal is a mathematics website offering step-by-step online calculators and solvers for topics including polynomial equations, rational expressions, systems of equations, matrices, complex numbers and analytic geometry. It also provides math lessons, formulas and tests. The site states it was designed by mathematician Miloš Petrović, who wrote the calculators, lessons and formulas. A paid homework help service is mentioned.
Doc Brown's School Science Revision Notes and Quizzes is a science revision website that began in 2000 as a chemistry site and has since expanded. It offers revision notes and quizzes for biology, chemistry and physics at lower secondary, GCSE, IGCSE and advanced level, keyed to UK exam boards including AQA, Edexcel, OCR, WJEC and CCEA.
