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A review of the Khan Academy website. Watch short videos that cover many subjects, that explain concepts in a great and easy to understand conversational manner.

Khan academy

(External Link)

  • A not-for-profit organisation with the mission of providing a world-class education to anyone, anywhere
  • The Khan Academy is all about using video to explain the world, with the work focussed on creating a good experience for students
  • They place deep understanding of content above anything else
  • Videos cover chemistry, organic chemistry, physics, maths, biology, history, economics

What the website offers:

  • Over 1800 videos, it is easily the most exhaustive collection of instruction on the internet
  • Learners can fill in almost any of their "gaps" from class with the content on this site
  • The content is in 10-20 minute videos especially made for viewing on the computer
  • Great conversational style of the videos – not what people expect when receiving maths and science instruction
  • You can access exercises by logging in – if you have a Gmail or Facebook account you simply sign in with these when prompted after clicking on“do exercises” at the top of the page. You can watch the relevant video and then attempt to complete the exercise, and submit your answer online

Classroom use

  • The videos do not follow a curriculum
  • The author believes that someone who truly understands the core concepts will thrive academically regardless of the curricularcontext
  • Because of the granular nature of the 10 minute videos, the content can be mapped to almost any state's or nation's standards
  • Khan Academy videos can be downloaded and saved to a flashdrive

Teacher and user comments

  • I think resources like the Khan Academy have a lot more potential in higher ed than things like lecture capture systems. I’d much ratherhave my students watch a few of these videos before class, then work through more problems and questions with me during class... I would imagine that many ofmy students would get more out of these videos than they would reading the textbook. I can’t see these kinds of videos replacing classroom instruction, butfor giving students first exposure to topics and for providing them with reinforcement after class – yeah, they’ve got lots of potential. (External Link)
  • I saw the piece on this wonderful teacher on PBS. Most of us strive to create an environment where the learner can be exposed to a variety ofexplanations about the phenomena we study. These certainly would be part of that mix as long as we fully credit the importance of the author's/teacher's work toour students. One day, we will hopefully teach ourselves out of our jobs (External Link)
  • I am now in college and learning more than I ever have in my life. But an inadequate math background has been holding me back. I found theKahn Academy in June of 2009, right after I completed Math 141 ( a college algebra course). I have spent the entire summer on your youtube page. And I justwanted to thank you for everything you are doing. You are a Godsend. Last week I tested for a math placement exam and I am now in Honors Math 200. No questionwas answered incorrectly. My placement test holder was so impressed by the breadth of my knowledge of math that he said I should be in Linear algebra. Mr.Khan, I can say without any doubt that you have changed my life and the lives of everyone in my family. I wish you and the Khan Academy the best of luck. (External Link)

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Physics - open resources and tools. OpenStax CNX. Jun 02, 2011 Download for free at http://cnx.org/content/col11308/1.3
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