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All the rules of basic algebra, with helpful explanations & examples for each equation. You can use these simple rules for arithmetic, exponents, and radicals to solve most basic algebra problems.

Free computer algebra system

The Physics Classroom serves students, teachers and classrooms by providing classroom-ready resources that utilize an easy-to-understand language that makes learning interactive and multi-dimensional. Written by teachers for teachers and students, The Physics Classroom provides a wealth of resources that meets the varied needs of both students and teachers.

Percentage calculator, online calculates percentage in many situations, simply enter the numbers and get the result and the formula of calculation.

Revise GCSE/IGCSEs and A-levels! Past papers, exam questions by topic, revision notes, worksheets and solution banks.

Build visual intuition for the basic quantum terms.

An interactive matrix multiplication calculator for educational purposes

Learn basic phenomena of quantum physics and test your knowledge!

Join Physics Forums, where students, scientists, and enthusiasts come together to explore and discuss the current understanding and practice of various scientific fields.

JavaScript 资源大全中文版，内容包括：包管理器、加载器、测试框架、运行器、QA、MVC框架和库、模板引擎等。由「开源前哨」和「前端大全」微信公号团队维护更新。 - jobbole/awesome-javascript-cn

前端开发者学堂致力于分享最新的CSS、HTML5、JavaScript、Node.js、Vue、React和动画等前端技术，提供丰富教程资源，帮助你提升前端开发能力。无论初学者还是经验丰富的开发者，共同学习、进步和分享，打造优秀的前端学习平台。

Math Calculators and Unit Converters

Quick, free, online unit converter that converts common units of measurement, along with 77 other converters covering an assortment of units. The site also includes a predictive tool that suggests possible conversions based on input, allowing for easier navigation while learning more about various unit systems.

OpenFOAM is the leading free, open source software for computational fluid dynamics (CFD), owned by the OpenFOAM Foundation and distributed exclusively open source under the General Public...

最专业的Ruby和Ruby on Rails学习平台

A simple, immediate and fast unit converter!

Daily science news on research developments, technological breakthroughs and the latest scientific innovations

OneConvert is a service that helps in your work, study and business. Our functionality allows to convert PDF files and Units of Measure safely and free.