I have been a high school science teacher for over twenty years, first in Bozeman, Montana and now at Freie Schule Anne Sophie in Berlin, Germany. My passion is providing high quality educational content to support students and teachers. Since 2007 I have been making science videos that systematically guide students to desired learning outcomes. Teachers can use my instructional materials to go with the videos and create their own step by step lessons.
Step by Step Science 
hey sir,
can you make a video about energy potential elastic please.
Thank you
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I have made vidoes about gravitational potential eneregy but not yet elastic potential energy. I will put it on my long list.
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Hi Brian, I just recently watch your video about finding; total volt. Equivalent resistance (Can you also call it Total resistance?), Total current, voltage drop across each resistor and what is current or total current through each resistor?
How come you put ohms law V=IxR at the Voltage Drop on the series circuit video but fail to do so on the parallel circuit video and instead putting in next to current through each resistor? Some simple explanation would be good.
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Hi! Your videos are so helpful! I use them for every topic! But I just realized you don’t have a video on momentum and collision for Physics. Could you make one? (Unless you already have it – but its under a different name – please disregard this)
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You are not the first to ask about this topic, but unfornuately I do not have any videos covering monmetum and collisions. It is on my list but I probably will not be able to get to it in the near future.
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Thank you for your videos. Your chemical reactions have been very clarifying to me minus a few questions I have. Your very helpful. I would love to have a way to get the moles worked out in my head the right way- gee, I try so hard but they always confuse me.
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Thank you for the great comment.
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Hey!
Why do you have a website if it just leads us back to the youtube videos? I only saw that you had a website through YouTube, then it tells me to go right back!
Super helpful, as a Chemistry Student struggling to understand Calorimetry Problems. Thank you!
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The website can be used to make it easier for people when looking for a specific topic.
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Hey sir…i was wondering if you can make videos about exponents and logarithms
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Sorry, now working on magnets and magnetism.
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Is it true that the older we het the harder it is to learn or retain information??? Sure seems like it’s true.
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Probably, but that just means that you have to try a bit harder.
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When a body is thrown up height is upward and mg is downward so work done is minus mgh but there is a gain in potential energy so how is it possible? If work done is negative of potential energy then how possible in this case plz explain . (External work and field work with constant velocity )
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Work is calculated as W = f x d x cos(theta). When you move something up, the displacement (direction of motion) and the direction of the force you apply are in the same direction, up, and are parallel to each other. The angle between parallel lines is zero degrees and the cos of 0 degrees = 1. So when you move something up you do positive work and the object gains an amount of potential energy equal to the work you do on the object.
When you move something down you do negative work on the object and it loses potential energy. Does that help?
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Sir Can you explain
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Sir Can you explainmathmatics trigonometry
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Hi sir recently I watched your kinematics vedios now it is so simple for me but I need some more examples feeply
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Hi mister, thank you so much for your videos. Your channel was highly recommended by my secondary principal, Richard Hengelbrok, here in Panama, Central America. Good job!!!
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That is awesome! Mr. Hengelbrok and I worked together for a year in Berlin, he’s a great guy. Please tell him that I say hello and wish him well.
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Sir,
I was wondering what sonication you use to make your videos? Rather than writing like Khan , your notes seen to pop in. How is that done? Copy and paste?
Thank you.
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I do not know what you mean by “sonication”, but I use Apple’s Keynote program to make all of the presentations that I show in my videos.
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2. An electron is release from rest in a uniform electric field. The electron accelerates vertically upward, travelling 45 m in the first 3.00 unit per second after it is release. What are the magnitude and direction of the electric field
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