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  • - [Voiceover] Welcome to the Khan Academy.

  • The goal of this video is to show you

  • all the different things that Khan Academy has.

  • It has videos, it has exercises,

  • it has an adaptive, super, I guess you could

  • call it robot tutor thing that will guide you

  • through content and make sure you master it.

  • So let's just take each of those one by one.

  • Many of y'all are probably coming to this saying,

  • "Hey, I have an exam tomorrow on DNA," or

  • "I didn't understand quite what's happening in class."

  • There the best thing to do might just be

  • go to the search bar, let me make sure you can

  • see the search bar, to go to the search bar

  • and you could search for DNA.

  • When you do that you see your first choice

  • right over is a DNA video.

  • This is actually the main video on DNA

  • and which you could start watching.

  • Or if you look to the right right over here,

  • you see that there's all other related videos

  • under heredity and genetics.

  • Then you can start browsing from there.

  • You could say, "Okay, let me back up a second.

  • "Let me go back to just all of biology."

  • I can see all of the sections are there.

  • Similarly, you might wanna search

  • for something in mathematics.

  • You might wanna say, "Oh, I have a question

  • "about quadratics."

  • Quadratics.

  • I'm gonna do a search there.

  • Okay, well let's see, there's something

  • about using the quadratic formula,

  • factoring quadratics 2.

  • I don't know which of these is right for me,

  • so let me just go into one of these

  • and start getting a little bit of context.

  • You see that what I actually just clicked on

  • is actually an exercise that gets me

  • to solve quadratics by factoring two.

  • I need to write my answer here.

  • If I don't know the answer, I have a bunch of hints.

  • If this all looks like Greek to me,

  • I can click on a video

  • that solves a very similar problem.

  • Or I might hey, this isn't what I was looking for.

  • But look over here, they're solving

  • a quadratic equation by factoring.

  • Factoring quadratic equations.

  • Maybe this is what I need to learn.

  • Or maybe I'm not even thinking about this stuff,

  • so let me just move up a level

  • to quadratic equations.

  • Now I can see the whole topic here.

  • Solving quadratics by taking square root.

  • Solving quadratics by factoring.

  • Completing the square, the quadratic formula.

  • Quadratic equation, graphing quadratics.

  • In general if you just wanna browse,

  • you say "Let me just see all the subjects

  • "that are available on Khan Academy."

  • You can go this drop-down right over here.

  • This starts to give you a sense of the breadth

  • of the content on Khan Academy.

  • Just in math, each of these is an entire subject.

  • K-2nd math, you have pre-calculus,

  • goes all the way up to multivariable calculus,

  • intergal calculus.

  • If I were to click on any one of these things,

  • it's going to take me into something called a mission.

  • A mission is going to give me a set of exercises.

  • We call this right over here the mission warm-up.

  • Based on how I perform on these calculus questions,

  • the system is starting to get a sense

  • of what I know and don't know and it will use that

  • to give me guided practice so I can learn more

  • and more and more calculus.

  • Eventually mastering calculus.

  • At any point if I have difficulty,

  • there's always videos here that will help me

  • understand the actual calculus.

  • Once I'm done with that, I will go to this dashboard

  • and it'll just tell me about how much have I

  • progressed in integral calculus, what have I mastered,

  • what have I not practiced yet,

  • what are my different badges.

  • If you do not wanna move immediately

  • into this mission world and you wanna say

  • what does Khan Academy have when it comes

  • to calculus in an unguided way,

  • that's where you go view full list

  • of integral calculus content.

  • Then you will go to this page,

  • where you see the breadth and scope

  • of the integral content.

  • Integrals, integration techniques,

  • integration applications, sequences and series,

  • AP calculus practice problems.

  • If you click there, you see the different

  • tutorials within, indefinite integrals

  • as anti-derivative, area under a rate function

  • as net change.

  • Hopefully that gives you sense of things.

  • We don't just have math and we don't just

  • have science, we have whole section here

  • on computer programming, which is tons of fun

  • where you can write your own computer program.

  • I'm using my son's account right now.

  • This is a computer program that we wrote.

  • This right here is a computer program

  • that we wrote together the other day.

  • It was good father/son bonding time.

  • And we have things in the arts and humanities,

  • like history and art history,

  • which is also very, very, very exciting.

  • And we have partner content.

  • We have partner content from the likes of

  • The Museum of Modern Art, Explortorium,

  • JP Getty Museum, The British Museums.

  • So a lot of stuff here.

  • Hopefully this video gives you a flavor

  • of the different ways you can use Khan Academy.

- [Voiceover] Welcome to the Khan Academy.

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B1 中級

カーンアカデミーの利用 (Using Khan Academy)

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    g2 に公開 2021 年 01 月 14 日
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