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mathway | algebra problem solver

free math problem solver answers your algebra homework questions with step-by-step explanations.

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course hero | make every study hour count

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sparknotes: today's most popular study guides

sparknotes are the most helpful study guides around to literature, math, science, and more. find sample tests, essay help, and translations of shakespeare.

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personalized vocabulary instruction | membean

membean is a vocabulary program that builds word consciousness and achieve lasting outcomes by prioritizing higher order thinking over memorization.

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taylor & francis online: peer-reviewed journals

search and explore the millions of quality, peer-reviewed journal articles published under the taylor & francis and routledge imprints.

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wyzant: find private tutors at affordable prices, in-person & online

find affordable, top-rated private tutors in 250+ subjects and test prep on wyzant.com. quick online scheduling for in-person and online tutoring help.

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nsf - national science foundation

nsf's mission is to advance the progress of science, a mission accomplished by funding proposals for research and education made by scientists, engineers, and educators from across the country.

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khan academy | free online courses, lessons & practice

learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. khan academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

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academia.edu - share research

academia.edu is a place to share and follow research.

Indonesia

三二一文库_www.wenku321.com

三二一文库提供各种日常写作指导，主要栏目有：范文大全、个人简历、教案下载、课件中心、 优秀作文、考试辅导、试题库、诗词鉴赏等...

China

一亩三分地社区: 留学|申请|求职|移民|生活 - 高信噪比 纯干货

美国加拿大留学申请,就业求职找工作,签证移民网站,包含计算机cs电子工程ee管理信息系统mis统计生统biostatistics数据科学data science analytics等各专业硕士博士申请信息

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study.com | take online courses. earn college credit. research schools, degrees & careers

take online courses on study.com that are fun and engaging. pass exams to earn real college credit. research schools and degrees to further your education.

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九九藏书网

图书,最好最全的在线免费阅读图书，小说 网站

China

ixl | math, language arts, science, social studies, and spanish

ixl is the world's most popular subscription-based learning site for k–12. used by over 13 million students, ixl provides personalized learning in more than 8,500 topics, covering math, language arts, science, social studies, and spanish. interactive questions, awards, and certificates keep kids motivated as they master skills.

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piazza • ask. answer. explore. whenever.

piazza is a free online gathering place where students can ask, answer, and explore 24/7, under the guidance of their instructors. students as well as instructors can answer questions, fueling a healthy, collaborative discussion.

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coursera | build skills with online courses from top institutions

join coursera for free and learn online. build skills with courses from top universities like yale, michigan, stanford, and leading companies like google and ibm. advance your career with degrees, certificates, specializations, & moocs in data science, computer science, business, and dozens of other topics.

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duolingo - the world's best way to learn a language

with our free mobile app or web and a few minutes a day, everyone can duolingo. learn 30+ languages online with bite-size lessons based on science.

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grammarly: free online writing assistant

millions trust grammarly’s free writing app to make their online writing clear and effective. getting started is simple — download grammarly’s extension today.

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hinative | a question and answer community for language learners.

hinative is a global q&a platform where you can ask people from all over the world questions about language and culture. we support over 110 languages.

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learn the latest tech skills; advance your career | udacity

learn online and advance your career with courses in programming, data science, artificial intelligence, digital marketing, and more. gain in-demand technical skills. join today!

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