i) A better understanding of the subject
By doing research work, you can know the subject in deep. You can know about each concept and theory properly with research work. You can develop mathematical ability and skills in problem-solving. Even linguistic skills become better by doing proper research work.
ii) Helps in finding the flaws
Research has its own benefits. When you get a school assignment, finding more information will help you to find out whether there are any flaws in the project. You can remove those flaws and search relevant points to add in the project. You can make your project or assignment better by doing more research work.