To enable to Parent Portal you would go to Settings > Parent Portal > Click Enable Parent Portal. From here, you will be prompted to set up the sections and permissions that you wish to give parents. Take your time going through here and click Save when you are done. You may want to require approval for more serious things such as allergies or medical conditions. This way when they do add/edit this information, you are made aware of it and need to approve it before the change is made.