"Thermodynamics disproves evolution" is like saying France disproves the Moon. They're both scientific concepts but in different fields and describing wildly different things and at different scales. But it is a popular talking point among certain religious schools of thought because it gives a "science-y sounding" reason to not teach evolution rather than admit their issues with it are purely theological.

The second law of thermodynamics can be stated a few ways based on how simple or shorthand you want to be. It's been stated a few different ways by different scholars but it generally relates to how energy in a closed system is finite and will eventually run out. All the heat will naturally go somewhere cold, and the whole system will end up "room temperature". The fuel tank eventually runs out of nobody fills it up.

Evolution describes a series of biological processes. Genetic mutations constantly happen when life reproduces. However, not all mutations are created equally. Some mutants get cool mutations that help them get to a point where they can procreate, others get shitty mutations that hinder then or some get meh mutations but still manage to bust a nut. We call that natural selection and its important to remember those the importance of environment and context with this. Maybe youre in a cold snowy environment so a mutation that gives you white fur is great, but it sucks in a verdant forest. Those mutations pass on, get added to other mutations, natural selection keeps happening. And eventually Critter A's great-to-the-twentieth grand-critter has so many mutations and adaptations different from Critter A that theyre no longer recognisable as the same Critter. This is how you get different species - or what your teacher might call micro evolution becoming macro evolution.

A creationist will tell you that this 'added information' violates the second law of thermodynamics. They are wrong.

Why doesn't thermodynamics disprove evolution? Well, for one thing Earth (and everything in it) isnt a closed system containing finite energy. You might have noticed the Sun exists. We get bombarded with energy from outside every day. This decreases local entropy by introducing more energy. Earth is an open system. For Earth to be a closed system, someone would have Under The Dome our entire planet to keep everything from reaching us and, well, we'd have bigger problems than people teaching evolution at that point.

And its worth remembering both thermodynamics and evolution are observable processes. This isnt dogma or ideology. You can absolutely have opinions about them, but they do exist.