Don't bother with the iPad... I got both and have to say that having a physical laptop (Mac or Windows) will absolutely demolish the iPad when it comes to practicality.
However, if you still would like to compare the practicality between the two devices, here is a quick overview of each of their advantages:
MacBook:
Advantages:
- Physical keyboard (Type longer and faster)
- OS has much more functionality (Since this is a desktop/laptop OS, you get much more functionality from programs, allowing the device to be more capable for the work you will be doing during school)
- Ability to run Windows (At times, you might be required to use a specific program which is only available on Windows. With an iPad, you have no option except to buy a Windows PC, but on a Mac, you can use boot camp to run Windows and run the windows programs)
iPad:
Advantages:
- Small form factor (Extremely portable and easy to carry around)
- Much more advanced screen (The 120Hz ProMotion iPad screen is absolutely stunning, with a much better experience compared to the MacBook, however you must keep in mind that if you don't get the 12.9", the screen will be significantly smaller compared to the MacBook)
- Much more fun to own (With a MacBook, you will often find that many games won't provide an amazing experience due to it being... A Mac - On an iPad, games are perfectly optimised for the device, providing an amazing gaming experience during your spare time)