khanacademy.org
Khan Academy provides educational lessons, courses, tutorials, or study material for self-learning.
Epidemic Calculator
Epidemic Calculator is an educational resource for documentaries, courses, books, reference material, or self-learning.
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Khan Academy provides educational lessons, courses, tutorials, or study material for self-learning.
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0Richard Nakka's Experimental Rocketry Web Site shares experiences, ideas and technical details of amateur experimental rocketry, where rockets and their motors are built from scratch. It includes the author's notes, flight logs and photographs, plus work by others. The site was originally posted in July 1997 and a 2026 downloadable version is offered for purchase.
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0BioNinja is a website built to cover the IBDP Biology curriculum, with information on syllabus components organised by topics or themes. It also offers experimental skills summaries, Powerpoints, summary notes, data analysis tasks and quizzes. The site notes it is a free resource set up by a single teacher and a work in progress.
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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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0MathPortal 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.
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0Airfoil 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.
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nakka-rocketry.net
Richard Nakka's Experimental Rocketry Web Site shares experiences, ideas and technical details of amateur experimental rocketry, where rockets and their motors are built from scratch. It includes the author's notes, flight logs and photographs, plus work by others. The site was originally posted in July 1997 and a 2026 downloadable version is offered for purchase.
ib.bioninja.com.au
BioNinja is a website built to cover the IBDP Biology curriculum, with information on syllabus components organised by topics or themes. It also offers experimental skills summaries, Powerpoints, summary notes, data analysis tasks and quizzes. The site notes it is a free resource set up by a single teacher and a work in progress.
docbrown.info
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.
mathportal.org
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.
airfoiltools.com
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.