Use your school journal diary or a calendar app on your phone to help you stay organised. Be sure to include your homework, any project work, tests, activities and hobbies. This will give you a clearer picture of the time you have to do your work.
It may help to have a weekly calendar in the kitchen or on the fridge, so everyone can see what you’re doing. Weekly family meetings are a great way of seeing what everyone’s plans are, and can help avoid any clashes.