The third one
Hope that helped :)
3)
Everyone should use a singular noun, instead of "their".
Tips to study is to review everything you learned in class, ask friends or family members for clarification if and or when you don’t understand something, you can always ask her teacher for extra work if you understand everything I just want more practice. To make notes I would recommend making notes as soon as your class is done or when you get home that way it is fresh in your memory. From personal experience I wouldn’t recommend doing notes while the teachers explaining the lesson
