Have you ever had trouble with studying for schoolwork or some big test? Even final exams? Well I have something that just might help you as it has helped me. You can simply incorporate what you are learning or what you are studying for into Minecraft. It literally can help with all subjects. For example, I had a huge Civics Final Exam coming up and I'm really bad at civics and it just doesn't stick to my brain, so what I did was join a USA server and actually experience what i was learning opposed to trying to read about it. After a day or two I experienced partnerships and other business stuff, taxes, having a job, and most importantly, working with a community. I actually ended up getting about an 90 on that final which was quite amazing considering the fact i have struggled all year. So if you want to know how to pull off something like this well just keep on reading.
Civics/History- Well just read my story and you should get the basic principle of it. Just try actually experiencing what your learning. Theres thousands of servers to help you, you just have to look.
Math- Unfortunately, Math cannot be completely applied as with algebra and higher grade maths but you can always practice the roots of it, multiplication, division, addition, and subtraction. All by building projects or simply even houses. Projects are usually scaled thus you have division/multiplication. Houses, well you need to know the dimensions don't you? Then you actually need to build it giving you your addition/subtraction.
Science- This one is a bit tricky and is quite hard to apply but it can be done. Once again, it only can be used as basic science. Try playing around with Minecraft physics and comparing it to real life. Notice gravel sand and you don't all fall at the same rate, only sand and gravel. "How can a torch hold up sand?" try asking questions like that to help determine what is realistic and what isn't. Then you can also study the behavior of the animals as a lot of there AI is accurate to real life. An example is at night they all try to go towards light. Or if they are hungry they will follow you if you have food. Try playing around with nature, most of it has some truth behind it.
English/Spanish- For english, try typing on servers and being 100% grammatically correct. Not as easy to do as you think. And when other people say something incorrect, correct them. For spanish or another foreign language. Go on an actual foreign server and speak their language as if you know spanish. If you get something wrong they probably will correct you.
Those are just some basics to get you started. Try something new and if it helps you, comment!