Search 80,891 tutors

Blogs Blogs

Khan Academy Blogs

Newest Most Active

The answer is “Yes” you can learn Cryptography from these videos, but honestly you are going to need a real degree to do the real stuff. You can find out that number theory and probability theory are used. Their video says, “a lock is only as strong as its weakest point” and suggests that conceptually codes may be reduced to fingerprints. I learned its called Frequency Analysis when you count repetitions, presumably with the purpose of breaking a code. It helps if you have some practice. I have some through my classes and standardized tests. There is believe it or not some code braking on tests like The SAT and the SHSAT. On The SAT it was an advanced problem. I used the following technique to solve the SAT problem: serially shift and algebraically move, decode from a latin alphabet to a numerical one. This is problem 16 page 418 from ISBN-13: 978-0-87447-852-5, The College Board’s The Official SAT Study Guide: A four-digit integer, WXYZ, in which... read more

There are two things that happen to the brain during the summer: either it gets smarter, or it gets dumber.  If you work on making it smarter this summer, then you'll have a stress free school year when it comes.   To help you on your path of smart awesomeness, I have put together this list of 5 ways to get summer this summer.   Video Games:  Your mom is wrong.  You should play video games.  Show her this YouTube video the next time she gets on your case: Jane McGonigal: The Game that Can Give You 10 Extra Years Exercise Play: Your mom is right.  To become smarter, your brain needs oxygen.  The only way to get oxygen to your brain is to move your body.  But don't do something as lame as exercising.  Get out there and find something fun.  To tell you the truth, I'm such a geek that I like to walk trails while reading my Kindle or listening to music.  Nature is lame.  But, if you are into... read more

Being in the mathematics field, I am constantly looking for online resources that break down problems in an effective and clear way. My favorite online resource that I have found the most useful is Khan Academy. Khan Academy has a variety of video tutorials in multiple content areas, not just mathematics. The videos are well organized into units and concepts which makes them easy to navigate. Having the video tutorials are wonderful because you can pause them if they are going too quickly, rewind to see something again, and replay for more exposure to the content. Khan Academy does a wonderful job at explaining the problems in depth and color coding the steps of the problem as they go through it. I suggest Khan Academy for both enrichment and remediation for anyone.

"With the backing of (Bill) Gates and Google, Khan Academy and its free online educational videos are moving into the classroom and across the world. Their goal: to revolutionize how we teach and learn. Sanjay Gupta reports."    For more information, here is a 60 Minutes interview on The Future of Education, Salman Khan's TED talk, and Bill Gates' interview.  

Khan Academy Blogs RSS feed