The Internet Has Massively Broadened Career Possibilities

Hi everyone, Sal here with my three-year-old son Azad, and we’re excited to announce the launch of Khan Academy Kids, which is designed to take students like Azad, ages two to five, to become lifelong learners. Hi friends, welcome to my room! Kids love t…

Mike isn’t sure how to add 189 + 608, help Mike by choosing an addition problem that is the same as 189 + 608. Now let’s look at these choices. Let’s just start with this first choice. Actually, all of these choices start with having 1 hundred; they all…

In the last video, we introduced you to the derivative property right over here: that if my function is equal to some constant, then the derivative is going to be zero at any X. We made a graphical argument, and we also used the definition of limits to fe…

Hi, I’m Dave from Khan Academy, and I want to show you how you can preview and make assignments from right within the Teacher Dashboard. So let’s take a look at how the Content tab works. From your Teacher homepage, click into a class, and you’ll see th…

To Mrs. Cordell, my fourth grade teacher, to Miss Peterson, to Mr. Garland, to Mr. Jones, to Miss Wolfe, here, Mrs. Young, Mr. Chavez, Mr. Bodhi, fifth and sixth grade, to Mr. Blake, to Mr. Lester, to Mr. Howard, to Mr. Zarnicki, Dr. John, to Mrs. Alvarad…

The function ( f ) is defined over the real numbers. This table gives select values of ( f ). We have our table here; for any of these ( x ) values, it gives the corresponding ( f(x) ). What is a reasonable estimate for the limit of ( f(x) ) as ( x ) appr…