In physics there would be units and dimensions, constants, motion, friction and rigid body, gravitation, work, energy and power, properties of matter, thermodynamics, oscillations and waves, relativity , optics . At a higher level, there's classical physics, quantum physics, statistical physics and electrodynamics.
In electronic and electrical engineering, it starts with ohms law which starts with the drude model. With laplacians, a network of differential equations can be solved. Then there would be VLSI, Power electronics, Analog and digital, communication systems and solid state physics. You can see electronics in the devices you operate.
Speedometer = Dynamo + Potential divider + Voltmeter.
Fun with symbols read to the end. For kindergarden and otherrs remember to come back to \Integral{x^2/3} as x^3/9. English has 26 alphabets, 2, 3,4, 5 6 , 7... letter words with 26 Pn words of each kind, Sentenes of 7 words on average with nouns adjectives, adverbs pronouns, verb and preposition . It has 10 numbers with many spaces and with a decimal and i there are real, complex, rational and irrational numbers and integers. At your level we can write code with stars and spaces and for loops to make a circle and line at any angle and thats how with million programmers starting with abacus PC was made. Code in ebook way down but first see this and revise. Work out lots of 10 digit or 3 digit multiplication and division and square root with your calculator to be on top of it and a handwritten notes app in paint or android or apple or with pen and pencil and paper.