**Calculus
Course Testimonials **

Nathan Annenberg Math Coach - USA |
A truly empowering experience. One caveat. VM is so powerful that I personally have to go back to previous lessons to totally retrace the steps needed to arrive at such elegance. i.e. I need to be prepared to explain to other educators exactly how these amazing methods were arrived at. |

David Robinson Math teacher (retired) - Canada |
I agree Nathan. This is much easier. The use of "ratio of gradients" alone can save hours of work by "traditional methods". You should be congratulated on an extremely well organized, innovative course. |

Richard Blum |
This was a wonderful class and I enjoyed it thoroughly. VM never ceases to amaze me in that some method or procedure that I have used for 45 years can be approached in a much simpler manner. It's almost like "where have you been hiding all of my life?" |

Ric Johnsen Businessman - Canada |
Another brilliant course. Thoroughly enjoyed it. It's wonderful to see how the vertical crosswise sutra is used throughout the various branches of mathematics. Also, your book on the Art of Calculus was a great resource. Look forward to future courses. |

Virgilio Ylagan Prudente Head of School - Philippines |
I was simply amazed as to how simple you came up with the formula for the derivatives and areas under the curves. I didn't remember Calculus as simple as this when I took it shortly after Nica was born. I sought out my old Calculus textbook and confirmed that their explanation on finding the derivative - the slope of the tangent line is too much complicated as compared to your methods using the gradient (slope) of the secant and tangent lines. |

Manoj Talwar IT professional - London |
This was an amazing introduction to the topic of Integration. I remember that in school, when Integration was introduced for the first time, it was described as the sum of areas of bars whose width tends to zero. That was like making learning unnecessarily difficult. |