Use Third-Party Apps to Practice in Your Spare Time
With all the different classes you take in school, it’s almost impossible to learn everything in one go. Fortunately, with all the apps available on your iPhone, you can relearn or practice a subject you didn’t initially understand.
The easiest way is to go to Google or YouTube and find an article or video that teaches you more about the topic you want to learn.
However, you can also use other apps like Khan Academy, Coursera, or even Duolingo to find a lesson on the subject you want to practice.