Study is not just to read and write but to follow an entire process: read the material beforehand, actively participate in class, revise it at home, make notes, ask questions to yourself, and work on them.
Be consistent with note-making; use stickynotes to tag topics. Mark keywords and update your notes by mentioning dates.
Inform your family about your study hours so you will face fewer distractions. Use social media blocker apps and set your phone to silent mode; take a 5-minute break after each session to avoid mental fatigue.
By studying in a group, most of your difficulties become clear on the spot; help each other to solve questions. Teach your friends about your topic; stick with the routine of revising together.
Multitasking is not beneficial in the long run, as it reduces the productivity of the work. Instead, focus on one task at a time and do quality work to boost your performance.