在实验操作之外,ScienceToys更注重介绍背后的科学原理,如下面所描述的“钟摆无止尽摆动”的原理。 21、Khan Academy 美国最知名的在线教育网站 适用年龄:5-16岁 网址:https://www.khanacademy.org 这是由麻省理工学院及哈佛大学商学院毕业生萨尔曼·可汗在2006年创立的一所非营利教育机构。 机构通过网络提供一系列...
阅读理解。KHAN ACADEMY Join Khan Academy now!Learn for free about math, art, computer programming, physics, chemistry, medicine, history and more.Why Khan Academy works Personalized learning Trusted content(内容)Tools to empower teachers Students practice at their own Created by experts, Khan With ...
Khan Academy is on a mission to give a free, world-class education to anyone, anywhere. Their personalized learning resources make them one of the best math websites available for all ages, in a huge array of subjects. (Grades K–12; free) Mathletics Here’s an online learning space th...
https://www.edutopia.org/blog/ccss-3rd-grade-math-strategies-mary-beth-hertz https://www.khanacademy.org/math/cc-third-grade-math/cc-3rd-add-sub-topic(this website is free of charge) https://corelaboratewa.org/three-common-core-strategies-for-division/ http://www.corestandards.org/Math/...
| Khan Academy khanacademy.org 更多视频 来自Web 搜索的类似问题 How do you write the partial fraction decomposition of the rational expression (s2+1)(s2+4)s3+s−4 ? https://socratic.org/questions/how-do-you-write-the-parti...
三角输入 微积分输入 矩阵输入 cos(cos(x)) 求值 cos(cos(x)) 关于x 的微分 sin(x)sin(cos(x)) 图表 测验 Trigonometry f(x)=cos(cos(x)) 视频 Trigonometry For Beginners! YouTube Trigonometry made easy YouTube Basic trigonometry | Basic trigonometry | Trigonometry | Khan Academy ...
Khan Academy has a lot ofinteractive practice problems, including even some word problems. There are several companies that provide practice problems for all possible topics in a particular grade (subscription-based), for examplewww.ixl.com. ...
E Singapore Math is a web-based math learning platform for K-5 kids. It supports homeschooling, school-based learning, and home support for kids who attend school. It takes the widely adopted and respected Singapore Math approach for the foundation of its instructional material and practice acti...
mention, you'll be taking the new digital SAT on a computer,so taking your practice tests online will get you used to how to navigate the software.Also, as part of its efforts toward greater transparency and equalizing access to test prep, College Board offers free resources viaKhan Academy...
Like many of the experts interviewed, Nazarian and her children use resources from the nonprofit Khan Academy, one of the most popular online learning tools. "Khan Academy is well-positioned for kids of different ages," Nazarian says, "with demos and practice lesson...