Khan Academy: The future of education?

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  • Опубликовано: 10 мар 2012
  • With the backing of 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.

Комментарии • 676

  • @tttuu3309
    @tttuu3309 8 лет назад +282

    This guy helps me to graduate from high school........ And still use his videos for my college

    • @skybear1121
      @skybear1121 7 лет назад +2

      LMAO

    • @megadopolisthemagnificent.7936
      @megadopolisthemagnificent.7936 7 лет назад

      Would have put a sarcastic punchline here.
      Then I saw Gizelle Blanc's comment. (He can totally...)
      Put mine to shame.

    • @rolandomarinhdez8262
      @rolandomarinhdez8262 6 лет назад +1

      I'm 32 and still listen to his videos while I work. I get educated as a hobby!

    • @karidhacker3196
      @karidhacker3196 4 года назад

      @@rolandomarinhdez8262 good one!

  • @mahmoodhasan8129
    @mahmoodhasan8129 8 лет назад +396

    If this man doesn't get the noble prize, then the noble committee has NO EMOTION... period.

    • @radiotv624
      @radiotv624 7 лет назад +6

      Mahmood Hasan Hahaha perfect quote

    • @siphilipe
      @siphilipe 7 лет назад

      Sorry Bob Dylan first.

    • @paulgamer1818
      @paulgamer1818 6 лет назад +6

      Yeah..but Nobel for what exactly?...In that case he should get it for Physics, Chemistry,Peace, Medicine and ofcourse Abel prize for Math.

    • @inserthere6387
      @inserthere6387 4 года назад +5

      agree he really changed the world, I went back to school, college, and I graduated with honors...how, khan academy!!! Guy needs to be worldwide!!! humanity will be sooo much better!!! he needs to get the noble prize !!!

    • @argusloud3500
      @argusloud3500 3 года назад +1

      Agreed 100%, I've been saying this for years!

  • @corey5454
    @corey5454 9 лет назад +197

    He can totally change this generation.

    • @niantubeisretired8183
      @niantubeisretired8183 8 лет назад +6

      I agree with you, but one problem.........Some people hate Learning....!

    • @SpongeXtermiat0r94
      @SpongeXtermiat0r94 8 лет назад

      +LOMES art class video resources or, some people don't want to be taught. Not to sound narcissistic but look at all those middle school students hating every minute there

    • @S3aCa1mRa1n
      @S3aCa1mRa1n 8 лет назад +1

      +LOMES art class video resources I disagree some people don't like learning. But it depends on the subject. Person x may hate learning math but he loves learning about art.

  • @isZionConfirmed
    @isZionConfirmed 8 лет назад +116

    Mr. Kahn is better at explaining things than my teachers, and I go to the best high school in my state

    • @Qopa
      @Qopa 8 лет назад +3

      +zvartnost u're dense... that's probably why

    • @isZionConfirmed
      @isZionConfirmed 8 лет назад +3

      Dopa44 I understand everything my teachers say when trying to explain something but Mr. Kahn just does a better job imo

    • @jarrethcutestory
      @jarrethcutestory 7 лет назад +4

      Khan is a genius though. It's not really surprising. It's unfair to expect your teachers to be as capable as him.

    • @jailynbillings
      @jailynbillings 6 лет назад +1

      Exactly Teachers do not teach as good as Khan

    • @mty7331
      @mty7331 6 лет назад +1

      I also go to a pretty good school.
      The only teacher that teaches better than Khan has 4 PhD's.

  • @cosmickitty9533
    @cosmickitty9533 9 лет назад +76

    I could cry I love Khan Academy so much! Thank you thank you for everything you do!

  • @jarrethcutestory
    @jarrethcutestory 7 лет назад +48

    He's a very good orator. He speaks confidently and enthusiastically.

  • @mystrywoman07
    @mystrywoman07 7 лет назад +40

    I got emotional I'm so proud! Thank you so much Khan academy for making my life better!

  • @janetkluttz7991
    @janetkluttz7991 7 лет назад +27

    This literally made me weep. I'm 56 yrs old, after being diagnosed with adult ADD and struggled all my years in middle school and high school and then afraid to go to college, I am excited for the kids who feel like they are left behind but now have Khan Academy!

    • @NiranjanRavikumar7
      @NiranjanRavikumar7 4 года назад +2

      That's beautiful. Khan Academy has made life better for all of us.

  • @nacl2086
    @nacl2086 10 лет назад +68

    I really respect him and don't know about rest of the people in the society, but he definitely didn't only change my life but also changed my perspective toward education and purpose of life.

  • @StreetSmartification
    @StreetSmartification 10 лет назад +55

    Khan is awesome!

  • @crazyabc3915
    @crazyabc3915 3 года назад +1

    خان بھائی! آج آپ کو پڑھاتے ہوئے دیکھ ہی لیا آخر!! بہت خوشی ہوئی یه جان کر کہ آپ کی اس محنت اور لگن سے دنیا بھر کو فائده پہنچ رہا ہے_ ایک عظیم کام ہے جو آپ سرانجام دے رہے ہیں_ خوش رہیں!!

  • @aldoralaplume566
    @aldoralaplume566 8 лет назад +30

    I just discovered this man a week ago, and I might pass Linear Algebra and Stats 2

    • @Peter_1986
      @Peter_1986 8 лет назад +1

      +Aldora LaPlume
      That's great.
      The most important thing when it comes to math is to learn stuff in he right order, and always make sure that everything is crystal clear.
      I would say that Arithmetic/Algebra/Geometry, in that order, are probably the fundamental subjects, and this will take you really far.

    • @Peter_1986
      @Peter_1986 7 лет назад

      *****​​
      It's also important to develop a good intuition for things, so that you don't rely too much on formulas.
      One example is the cosine formula for triangles - it is pretty easy to derive that formula from scratch by splitting an arbitrary triangle into two right triangles, and then comparing their respective sides and angles and finally combining them so that the cosine of one angle only depends on the sides of the original triangle.

    • @Peter_1986
      @Peter_1986 7 лет назад +1

      *****
      Indeed.
      However, it might sometimes be more practical to start with simply presenting a formula if it has a complicated derivation, so that the students at least can start using it.
      For example, the area of a circle pretty much requires calculus to be derived properly, since you will have to do something like taking the integral of the areas for an infinite number of rings of greater and greater radius - for example, you could say that one ring has the area 2·π·r·dr and then integrate this from 0 to R, which will result in the area of the circle --- π·R².
      This would be straightforward if you have some knowledge of integral calculus, but it might be too complicated for people who are just starting out with Geometry and most likely at that point have knowledge of Arithmetic and Algebra, although they could probably understand the general ideas.

    • @es7951
      @es7951 5 лет назад

      @@Peter_1986 wont you shut UP

  • @nafiahidris1344
    @nafiahidris1344 8 лет назад +15

    He is not only a great teacher but a humorous and a witty guy. I mean u can see that when he says "i can fly in between a laundry or a bath"

  • @Polarcupcheck
    @Polarcupcheck 10 лет назад +10

    Khan academy is awesome. I learn new angles to concepts I know well, which makes it a great review.
    Like people say, the pause button is tremendously valuable.
    The idea that you don't have to go to class when you don't feel up to it.
    Skip around content when reviewing to break up monotony.
    I'll bet anything math and science achievement goes up in people who use it.

    • @yayabrazie
      @yayabrazie 9 лет назад

      Its nice to be able to pause the video or replay a section and to hear a statement again. Its easier to make connections! He is so helpful!

  • @madaninouha8561
    @madaninouha8561 10 лет назад +10

    A lot of love and RESPECT from Tunisia

  • @starscreen.202
    @starscreen.202 7 лет назад +39

    This guy helps me alot!!

  • @loieberle9654
    @loieberle9654 7 лет назад +6

    How to become educated at home, without being gagged by tuition costs! This video clip came on after I watched the video clip emailed to me today by sal, thanking me for my donation to the Khan Academy. Yes, I support these guys - it helps a lot of people!!

  • @MrZeyad008
    @MrZeyad008 9 лет назад +7

    His voice makes it easy to focus on what he says

  • @lamborgenie6923
    @lamborgenie6923 8 лет назад +140

    lol 6:18 a "khancept"

    • @niantubeisretired8183
      @niantubeisretired8183 7 лет назад +3

      I love this comment

    • @kitkatmeowskis2108
      @kitkatmeowskis2108 7 лет назад +2

      NianTube0 I just saw this and was like OHHH MAN I COULD NOT THINK OF THIS

    • @chandler1473
      @chandler1473 7 лет назад +1

      LamborGENIE he should totally use that on his website. the Khancept of Khan

  • @GIMFangela
    @GIMFangela 8 лет назад +6

    This guy is EPIC!!!! seriously online tutorials are the best thing ever, once I learnt the concept, it's really much more easier for me to do the exercises and THINK. Instead of snoozing off in class!!!!(since my maths teacher also took khan 's approach to teach us now)

  • @nadermohtadi7762
    @nadermohtadi7762 8 лет назад +3

    I remember seeing this exact episode on 60 minutes... Never knew this guy would be helping me so much

  • @piusodejayi2883
    @piusodejayi2883 7 лет назад +2

    Whao, this is huge! Great vision. Please keep the flag flying Khan.

  • @mahmoodhasan8129
    @mahmoodhasan8129 8 лет назад +7

    What a concept... world class education and all for free. Who would've thought of that. How about a world class health care... all for free... is it at all possible. Right... What do you say Sal.

    • @666abesanchez
      @666abesanchez 8 лет назад

      +Mahmood Hasan We'll get there one day!

  • @jasminebenigno-hall1596
    @jasminebenigno-hall1596 7 лет назад +6

    He's pretty much the only reason I'm passing math.

  • @scibatrista4379
    @scibatrista4379 8 лет назад +13

    I wish that my school used Khan Academy......

    • @jinjunliu2401
      @jinjunliu2401 6 лет назад

      Sciba Trista For now I think it's better for students to use it as home to learn a concept better if their teacher didn't explain it well enough (high school)

    • @jinjunliu2401
      @jinjunliu2401 6 лет назад

      khan academy doesn't have enough exercises to really master hard concepts for most people

  • @Ehg3333
    @Ehg3333 9 лет назад

    Fabulous I'm excited to use this program for my homeschoolers thank you.

  • @tylerkarnes5455
    @tylerkarnes5455 10 лет назад +2

    Thank you for being true heroes.

  • @michellemichelle5202
    @michellemichelle5202 2 года назад

    So thankful for Khan Academy!

  • @Diveintonewenglish
    @Diveintonewenglish 10 лет назад

    Very great. Let's all strivevto make a change

  • @bythetimeyoufinishedreadin9083
    @bythetimeyoufinishedreadin9083 7 лет назад +5

    I love khan academy, and my precalc also does a "flipped" class. But there's one problem...I get home at 5, sometimes 7, so its difficult trying to watch the videos and learning the concepts. If I took easier classes, it would be heaven.

  • @kennethhaines2228
    @kennethhaines2228 11 лет назад +1

    Thank You Khan!! There is no way I could get through organic chemistry without you.

  • @cherylwilliams3194
    @cherylwilliams3194 7 лет назад +1

    God bless and keep you.

  • @jovas14rocks
    @jovas14rocks 8 лет назад +4

    also, the rewinding features is helping kids with ADD/ADHD or Chronic Fatigue Syndrome.

  • @tlove21
    @tlove21 9 лет назад +17

    So I sucked at math during high school only c+ was my highest grade. Teacher in no easy way said I was hopeless. 14 years later I took maths 2 passed with a- working with my teacher and watching khanacademy videos. 1 year later took calculus 1 passed with a b+ was sick during that course and missed a few classes so mostly khanacademy concepts brought me through that. Now I plan to do physics and more sciences along with calculus 2. I am grateful for Sals dedication as my daughter is now top of her class in math and increasing in other areas redefining her study methods.

    • @Peter_1986
      @Peter_1986 9 лет назад +3

      It was probably your teacher who was hopeless, then.
      Good teachers can teach things to anyone, because they know how to reach out to every student.
      Some teachers have this annoying attitude that they almost seem upset when a student asks questions that "are obvious", and that's exactly the kind of attitude that intimidates people to ask questions in the first place.
      If a student is unsure of something, then he or she should always feel comfortable to ask about it, and NEVER feel "hopeless".

    • @tlove21
      @tlove21 9 лет назад +3

      Agreed I started teaching and saw massive growth in students. I always believed in making classes open for dialogue and laughter. Took an IT class from an average of 20% to an all out class average of 75% in less than a month. I was called in to help them pass their final exams. Teachers need to understand that it not only takes loving your job, it takes loving your students.

    • @Peter_1986
      @Peter_1986 9 лет назад +1

      Exactly, and I'm glad to hear that.
      Actually caring for the students makes an incredible difference, and makes the whole climate much more friendly and welcoming.
      Of course, the courses should be taken seriously and sometimes need to be formal, since you often need to use formal language to clearly explain how math and science works - but there is nothing that says this should exclude a relaxed teaching style and a sense of humour.
      One lecturer that I have a lot of respect for is professor Gilbert Strang from MIT, he is a good example of how I think teachers and professors should behave during a lecture.

  • @Mintie365
    @Mintie365 10 лет назад

    THIS is truly heartwarming and inspiring. A man actually making a change in the world with the gift he was given and not for his own selfish needs. Definitely deserves recognition!

  • @chiosarco
    @chiosarco 6 лет назад

    This academy is helping me to graduate, from Perú...just amazing¡¡¡¡¡

  • @user-zs1vs6wg3d
    @user-zs1vs6wg3d 8 лет назад +2

    دمتم في خدمة التعليم والتعلم اشاهد ماتقومون به فرحا ومشجعا شكرا جزيلا

  • @Stringbean421
    @Stringbean421 5 лет назад

    Thank you Mr Khan. Khan Academy is amazing. I'm a mature student learning Algebra from home just for the heck of it and I'm loving it.

  • @nicolezhang8116
    @nicolezhang8116 8 лет назад +1

    when i got introduced to khan academy back in 6th grade, I groaned because of the more learning I would have to do. But it's only after entering high school that I realized this is actually a huge help, especially for all the AP classes I'm planning to take. The fact that the founder can break such complex things into no longer than 15 minute vids, a miracle and my forever grateful heart.

  • @abhishekbasu6406
    @abhishekbasu6406 6 лет назад

    Teachers are building blocks of society and here he is... Thank you sir

  • @aishasaeed2808
    @aishasaeed2808 9 лет назад

    The way khan academy has helped me is unbelievable

  • @YourWealthCome
    @YourWealthCome 5 лет назад

    I am a 40 year old man who grew up with major learning disabilities and I have learned so much in the past year; most of all a deep understanding of maths. Thank you Sal!

  • @soccerchic365
    @soccerchic365 11 лет назад +3

    "if this does not blow your mind, you have no emotion" My reaction to the website!

  • @redshuyin06
    @redshuyin06 11 лет назад

    thank you so much Sal Khan!

  • @wgalkow
    @wgalkow 10 лет назад

    I'm a 71 1/2 year old new subscriber! Never too old to learn! Yes, I think he looks like a young Ray Romano.

  • @rosado99
    @rosado99 10 лет назад

    Thank you so much, My son David is learning with your web site. You are an angel in education.

  • @MiaAlexandriaaa
    @MiaAlexandriaaa 12 лет назад +1

    I love Khan. I found him last year when I was searching the four fundamental forces. I instantly subscribed to him. He breaks it down so much that you have to grab he concept of it. Now he's helping me excel in biology and geometry. Thank you, Khan! :)

  • @jailynbillings
    @jailynbillings 6 лет назад +1

    This dude helped me get a B+ in math.Thanks to Khan Academy i understand Math better.Khan Academy has helped me improve so much in math.

  • @davidhdz1989
    @davidhdz1989 9 лет назад

    Wow...this really touched my heart. Purely amazing! Amazing visionary! All of the luck in the world to you, Sir! To the future of education!

  • @BobyK659
    @BobyK659 7 лет назад

    Sal Khan is a Superman.. Great teacher.. Generous person ...willing to share all he knew to everybody in a simple and easy way .Everything absolutely free. All the best .May God bless you.

  • @bryannguyen1260
    @bryannguyen1260 9 лет назад +14

    KHAAAAN!

  • @tennisrulz1995
    @tennisrulz1995 12 лет назад

    This guy is absolutely wonderful. He actually cares about the kids in this world and he will change it for the better with such a big heart. I don't know how in the world I can thank him; he has helped me so much!!

  • @Lseers08
    @Lseers08 10 лет назад

    I'm ecstatic to see that Khan Academy is helping students of all ages. Me personally, I don't know if I would have made it through college without his videos. Absolutely amazing, and I'm not at all religious but I will say that he is a gift from the heavens! Such an inspiring human-being!

  • @mariejohannesen
    @mariejohannesen 10 лет назад

    I'm attending paramedic class at high school in Norway. We dig deep in most topics within anatomy, physiology and pathophysiology.
    Khan Academy has helped me a lot, because not only does he explain it simple and he starts at a beginners level, he also shows you why and how things work. Reading a text about the hearts electrical system, is barely enough to understand it. Me, and most of my classmates need to SEE how things work, to understand it. It's also a LOT easier to remember if you have a visual memory of a physiological function. Thank you Khan Academy, for making my education a lot easier!

  • @Mo_ayman_ahmed
    @Mo_ayman_ahmed 7 лет назад

    excellent job.. Greetings from Egypt

  • @norbster10231023
    @norbster10231023 8 лет назад +1

    This has been a life saver for some of my workers who are in school and taking physics. Khan rocks.

  • @msbettykay
    @msbettykay 11 лет назад

    Great story, superb teacher.

  • @Elshibly
    @Elshibly 11 лет назад

    WOW! i use this guy ALL the time! never knew he was such a big deal! LOVE YOU KHAN! you saved me soo many times!

  • @ogop79
    @ogop79 12 лет назад

    Thanks for informing us about this great teacher. If it had not been for 60 minutes I wouldn't had been able to find out about the Khan Academy.

  • @nineigee
    @nineigee 3 года назад +1

    God bless this guy!🙏
    Mr. Khan is the only one person who helped me to understand subjects and pass a lot of my exams with the best results!

  • @Niti10
    @Niti10 6 лет назад +6

    Khan for Nobel 2018

  • @TamiJo65
    @TamiJo65 11 лет назад

    I am a LPN returning to college for my RN degree after 15 yrs. I came across a science lesion on skin a few months ago. I watched it in addition to all my assigned reading. Last night I was so burnt out from reading I kept falling asleep. The peripheral vascular system is not very exciting reading material. So I googled the doodle instructor for help. I refreshed my knowledge with the cardiac and peripheral vascular systems and enjoyed it. As a AADD visual learner, Khan Academy is amazing!

  • @omarrjb
    @omarrjb 11 лет назад

    Great man! I love his lectures as a high school sophomore trying to get a head start on physics to move onto AP my senior year. Thank you Mr. Khan!

  • @DjAntwuan94
    @DjAntwuan94 11 лет назад

    This is the future, already with internet you have almost all the knowleged in the world, now you have a virtual teacher. We are moving forward

  • @sarkasedlackova3524
    @sarkasedlackova3524 8 лет назад

    Mr. Khan, thank you that you teach me. I always wanted to study medicine but I have cerebral palsy. So I study health education and special needs in education at one university. Hovewer, it is not enough for me. I am still searching for new informations and from time to time I watch your vidros. Sarka Sedlackova, Czech Republic

  • @TarisRedwing
    @TarisRedwing 9 лет назад

    I've been using Khan academy for a few years now and its amazing some how the format works very well with the way I learn. I also have dyslexia and ADHD which makes it almost impossible for me to read though a book without loosing track of what I was even reading. It's helped me immensely. The format and the sound of him speaking keeps my attention so well.

  • @gamifiedlife7958
    @gamifiedlife7958 6 лет назад +1

    Awesome KHANcept.

  • @iMusikkForeva
    @iMusikkForeva 11 лет назад

    The guy is so humble and grateful......respect. (:

  • @elliezaman5505
    @elliezaman5505 7 лет назад +6

    He is a Bangladeshi..really proud of him

  • @young-igotana-jamie5316
    @young-igotana-jamie5316 10 лет назад

    simply amazing!

  • @csm5040
    @csm5040 5 лет назад

    I owe a lot to Mr. Sal Khan. God bless him.

  • @swatisquantum
    @swatisquantum 12 лет назад

    Simply amazing!

  • @cookingcornnor5977
    @cookingcornnor5977 3 года назад +1

    Amazing

  • @soksitha7027
    @soksitha7027 6 лет назад

    I happy that join with you

  • @djcece
    @djcece 12 лет назад

    Wow... This guy is incredible. Thumbs up man. You the best!!!

  • @realangelsobo
    @realangelsobo 7 лет назад

    Our math has changed so much that I can't even go to any of my relatives for help. I'm glad Mr. Khan stepped up to help us with school!

  • @NimN0ms
    @NimN0ms 10 лет назад

    I got way too much respect for this man. He has helped me get through many of my college courses. Every ounce of respect for this man is not enough.

  • @sknmrowley
    @sknmrowley 7 лет назад

    What a concept...love it.

  • @7aayat
    @7aayat 10 лет назад

    Here in the UK, kids has to have private tuition to succeed. You sir just save me a lot of money that I don't have. Thanks ever so much...

  • @williampclark
    @williampclark 12 лет назад

    Great story. Keep up the innovation.

  • @suleman8215
    @suleman8215 9 лет назад +1

    I respect him and love him so much.please add more videos on physics.from Ethiopia

  • @josephcarney2437
    @josephcarney2437 8 лет назад

    amazing truly amazing

  • @iMusikkForeva
    @iMusikkForeva 11 лет назад

    Thank you so much Mr.Khan! Without Khan Academy I'd be failing miserably. The way this program works is great!

  • @abhilashborah25
    @abhilashborah25 11 лет назад +1

    All I can say..
    "You are the Best!"

  • @akaphoenix1980
    @akaphoenix1980 12 лет назад

    I love it and I'm a teacher who has to lecture due to no texts and no funding for computers. This needs to happen and funding to improve classroom technology needs to go hand in hand!

  • @HenggaoCai
    @HenggaoCai 12 лет назад

    This has been so helpful for my pre-calculus trignometric functions and identities

  • @thesilverwolf1560
    @thesilverwolf1560 5 лет назад

    My mom make me use this for my homeschooling. It really help me because I'm autistic and dyslexic it helps me understand what it is. if a teacher try to explain this to me i won't understand them. it helps alot

  • @dres4801c
    @dres4801c 9 лет назад +1

    this is amazing.

  • @Bud5936
    @Bud5936 10 лет назад +1

    He hearlds the groth of education, Thank you Mr. Kahn, only writing surpasses your contribution.
    thank Mr. Kahn

    • @Bud5936
      @Bud5936 10 лет назад

      This is the future of education.

  • @bwtupper
    @bwtupper 10 лет назад +4

    What a Khancept!!

  • @muhammadzahrani8269
    @muhammadzahrani8269 8 лет назад

    a great effort with a great man

  • @LLover3
    @LLover3 11 лет назад

    Great story. I started using the Khan Academy after watching the 1st story. This is great! I remember how I was struggling in Algebra. At that time and even after graduation, I didn't like the stigma in U.S. society that you had to be smart to do certain things like Trig and Calculus. This academy really blocks this stigma. It was amazing to take a few Trig lessons and actually doing and understanding the concepts. Wow! Great job! I only wish it was available when I went to school.

  • @sandracortes171
    @sandracortes171 7 лет назад

    Ha sido un excelente apoyo para mi hijo en la escuela y para mi

  • @kittybug06
    @kittybug06 11 лет назад

    Love Khan! Thank you so much~

  • @naghmanasherazi560
    @naghmanasherazi560 12 лет назад

    I am studying to become a Cytogeneticist; your Organic Chem videos REALLY helped to refresh concepts and learn new ones! Thank you, Salman! I intend to use your videos to help my son learn 6th grade Math lessons :) Keep up the great work!

  • @wish2505
    @wish2505 6 лет назад

    khan is sooooooooo smart..he explain these complex subjects and make them seem like simple 1 and 2 abc English subject..he helped me get distinctions....he should be in the history books of smart people who we learnt about already

  • @shakthak
    @shakthak 12 лет назад

    This, people, is the type of stuff the News should inform us of. Khan is awesome

  • @darkcresthealer
    @darkcresthealer 10 лет назад +1

    This guy is an amazing teacher

  • @lorenarutledge1507
    @lorenarutledge1507 11 лет назад

    Learning is always better when its on your time. Students don't want to listen in class. They'd rather socialize and get distracted by the dumb kids. They learn better when they decide to sit down, shut up, and pay attention when no one else is around to distract them. Great website. I use it in my classroom.

  • @norarifahibrahim1953
    @norarifahibrahim1953 4 года назад

    Now, it really practical when 2020.