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About | Khan Academy
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.
2024年4月25日
Khan Academy Math
Basic addition | Addition and subtraction | Arithmetic | Khan Academy
7:43
Basic addition | Addition and subtraction | Arithmetic | Khan Academy
YouTubeKhan Academy
已浏览 353.3万 次2007年3月10日
Algebra: Linear equations 1 | Linear equations | Algebra I | Khan Academy
7:28
Algebra: Linear equations 1 | Linear equations | Algebra I | Khan Academy
YouTubeKhan Academy
已浏览 286.8万 次2006年11月19日
Introduction to long division | Multiplication and division | Arithmetic | Khan Academy
11:39
Introduction to long division | Multiplication and division | Arithmetic | Khan Academy
YouTubeKhan Academy
已浏览 208.4万 次2010年1月20日
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Ever heard (or felt) “I’m just not a math person”? Try practicing on Khan Academy: instant feedback, no judgement, a variety of questions, and hints along the way. Give it a try! 👉 khan.co/mathonkhan | Khan Academy
0:31
Ever heard (or felt) “I’m just not a math person”? Try practicing on Khan Academy: instant feedback, no judgement, a variety of questions, and hints along the way. Give it a try! 👉 khan.co/mathonkhan | Khan Academy
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已浏览 1.7万 次2018年4月25日
We’re excited to announce that studying for the SAT for 20 hours on Khan Academy’s free Official SAT Practice is associated with an average score gain of 115 points. That’s nearly double the average score gain compared to students who don’t use our free test prep. Start studying today! http://khan.co/SATStudyonKA | Khan Academy
1:39
We’re excited to announce that studying for the SAT for 20 hours on Khan Academy’s free Official SAT Practice is associated with an average score gain of 115 points. That’s nearly double the average score gain compared to students who don’t use our free test prep. Start studying today! http://khan.co/SATStudyonKA | Khan Academy
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已浏览 8.6万 次2017年5月8日
Introducing Khan Academy’s New Intro to Computer Science Course with Python
0:58
Introducing Khan Academy’s New Intro to Computer Science Course with Python
Khan Academy
2024年8月15日
Khan Academy Science
Elements and atoms | Atoms, compounds, and ions | Chemistry | Khan Academy
13:09
Elements and atoms | Atoms, compounds, and ions | Chemistry | Khan Academy
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已浏览 424.6万 次2011年8月1日
Cell parts and their functions | Cells and organisms | Middle school biology | Khan Academy
4:14
Cell parts and their functions | Cells and organisms | Middle school biology | Khan Academy
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已浏览 13.6万 次2022年2月28日
Science on Khan Academy
2:44
Science on Khan Academy
YouTubeKhan Academy
已浏览 1.4万 次3 个月之前
Ever heard (or felt) “I’m just not a math person”? Try practicing on Khan Academy: instant feedback, no judgement, a variety of questions, and hints along the way. Give it a try! 👉 khan.co/mathonkhan | Khan Academy
0:31
Ever heard (or felt) “I’m just not a math person”? Try practicing on …
已浏览 1.7万 次2018年4月25日
FacebookKhan Academy
We’re excited to announce that studying for the SAT for 20 hours on Khan Academy’s free Official SAT Practice is associated with an average score gain of 115 points. That’s nearly double the average score gain compared to students who don’t use our free test prep. Start studying today! http://khan.co/SATStudyonKA | Khan Academy
1:39
We’re excited to announce that studying for the SAT for 20 hours …
已浏览 8.6万 次2017年5月8日
FacebookKhan Academy
Introducing Khan Academy’s New Intro to Computer Science Course with Python
0:58
Introducing Khan Academy’s New Intro to Computer Science Cours…
2024年8月15日
Khan Academy
"It's amazing, and it's free. It's free!" – LaToya Grubbs, middle school teacher, Georgia. Join Khan Academy today to help every student succeed with personalized practice. | Khan Academy
0:23
"It's amazing, and it's free. It's free!" – LaToya Grubbs, middle school t…
已浏览 6.2万 次2019年2月27日
FacebookKhan Academy
Khan Academy Goes Way Beyond Math: New Courses Launch for 2024 School Year in STEM, Humanities, Computer Science, and More
2:24
Khan Academy Goes Way Beyond Math: New Courses Launch for 20…
2024年8月6日
Khan AcademyKhan Academy
Calling all teachers! 🧒📣Khan Academy offers K-14 standards-aligned content in math, science, history, art and more. We have 50,000 practice problems for remediation and enrichment. Free for teachers and students!📣 | Khan Academy
0:28
Calling all teachers! 🧒📣Khan Academy offers K-14 standards-aligned con…
已浏览 524 次2019年4月11日
FacebookKhan Academy
15K views · 137 reactions | "One of the tools that I choose to use because I believe in the curriculum, the rigor in it, is Khan Academy." – Isai Baltezar, 3rd-grade teacher, California. | Khan Academy | Facebook
0:22
15K views · 137 reactions | "One of the tools that I choose to use beca…
已浏览 1.6万 次1 周前
FacebookKhan Academy
Teaching Programming Online at Khan Academy
2013年10月23日
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The Ultimate Java Masterclass: Beginner to Coding Superstar!
已浏览 50 次2024年11月13日
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Learn Java
2020年4月24日
weebly.com
1:33
Java Tutorial - Learn Java from Scratch
已浏览 8.8万 次5 个月之前
intellipaat.com
Java Bootcamp for Beginners 2023: Solve Coding Challenges
2023年4月19日
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Challenge Shining Scaling Sun Khan Academy
已浏览 7089 次2020年6月30日
YouTubeDarknightcerb
3:19
Combining multiple joins | Computer Programming | Khan Ac…
已浏览 2.8万 次2015年5月11日
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Challenge Random Blobber Khan Academy
已浏览 4601 次2020年7月7日
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Learn Java - 1.0 Hello World | Codecademy Walkthrough
已浏览 1.6万 次2020年9月24日
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Challenge Calculator Khan Academy
已浏览 2.4万 次2020年1月14日
YouTubeDarknightcerb
1:08
Challenge Static Functions Khan Academy
已浏览 2441 次2020年9月15日
YouTubeDarknightcerb
6:51
Object Types | Intro to JS: Drawing & Animation | Computer Program…
已浏览 2.2万 次2013年12月5日
YouTubeKhan Academy Computing
1:49
Introduction | Java | Tutorial 1
已浏览 18万 次2017年10月22日
YouTubeGiraffe Academy
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Constructors | Java | Tutorial 28
已浏览 8.1万 次2017年10月22日
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Challenge Funky Frog Khan Academy
已浏览 1.8万 次2019年11月5日
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Using Khan Academy
已浏览 13.9万 次2014年12月18日
YouTubeKhan Academy
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Classes & Objects | Java | Tutorial 26
已浏览 15.5万 次2017年10月22日
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Challenge Waving Snowman Khan Academy
已浏览 1.4万 次2019年10月15日
YouTubeDarknightcerb
1:31
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已浏览 839.3万 次2014年8月19日
YouTubeKhan Academy
1:21
Challenge Your First Button Khan Academy
已浏览 2.8万 次2020年2月11日
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Introduction to Khan Academy Kids
已浏览 130.1万 次2020年3月2日
YouTubeKhan Academy
49:47
Lecture 1 | Programming Methodology (Stanford)
已浏览 255.4万 次2008年7月3日
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