Parents are there to help them get organized and to encourage them when they get stuck. It's a good idea to check with the teacher at the beginning of the year to get a sense of how much assistance to provide your child. Check with your child's teacher if you are not sure about how much time to set aside for study. Make it a regular period, though, with a beginning and an ending time. Provide a quiet place for study with minimal distractions.
Some children work better with a little, low-level background noise.
Children don't necessarily need to study in a private space. Provide basic materials. Pens, pencils, lined paper, pencil sharpener, and so forth are usually all your child will need. In higher grades, your child may need graph paper, a dictionary, and other materials. If getting organized is a problem, involve the teacher.