Basic skills Year 4
Quantities and units7:30
Ratios and percentages3:15
Scientific notation5:22
Calculating with powers of ten3:18
Pythagoras and trigonometry3:19
Deriving units from a formula7:47
Significant figures6:24
Line of best fit5:07
Relationships and the constant5:20
Linearising a graph4:41
Electricity Year 4
Electric current6:12
Voltage and capacity4:43
Connecting ammeter and voltmeter4:10
Resistance and Ohm's law4:21
Resistance of a wire4:40
Variable resistor, NTC, PTC and LDR3:40
Series circuit3:32
Parallel circuit3:56
Series-parallel circuit3:37
Circuits practical test5:13
Power2:58
Kilowatt-hour3:05
Sound Year 3
Sound and vibration6:53
Frequency, amplitude and pitch5:57
Resonance and vibrating along6:17
Fundamental, overtones and timbre6:06
The tone of an air column3:15
Decibels and loudness3:31
Loudness and distance3:27
Anti-noise2:31
The ear and hearing threshold5:38
Hearing damage and risk threshold6:23
Forces Year 3
Types of forces3:06
Calculating gravity3:15
Centre of gravity2:48
Force meter: range and precision3:11
Elastic force and spring constant3:41
Directly proportional relationship3:37
About me

My name is Thomas Schuurmans, and I have a passion for physics and for understanding why things work the way they do. What I want is to get young people asking “why is that?” and “how does that work?” more often, and to hand them the tools of physics in a way that is simple and that you can see.
I graduated in applied physics at Delft University of Technology in 2003. After that I spent more than twenty years outside education: first at TNO, the Dutch applied research institute, then at a design agency, and eventually founding Proportion Global, through which I work on innovation questions in Africa, Latin America and South Asia. That work resembles physics more than you would expect: don't start from a solution, first understand what is going on, try something, be wrong, and look again.
Since 2026 I have been teaching physics to both lower and upper secondary classes, and I started a master's at the University of Amsterdam for my full teaching qualification. That is where I learned that a secondary school pupil's real attention for new material lasts about seven minutes. And my own weakness happens to be telling too many side stories.
That is where the idea came from: videos that explain one topic sharply and visually, inside those seven minutes. I make them for my own pupils. Then I publish them, because good explanation should be within reach of anyone who needs it, wherever you live and whatever language you think and speak in.








