To use Schoolwork, you must use your school account.
Before you begin using Schoolwork, check that you meet the following additional requirements.
Teachers can only assign activities for apps already on their devices, and students can only work on activities in apps already on their devices.
A school account with a student role. Teachers and students must have accounts from the same school. If you haven't got a school account, contact your teacher.
Make sure you type your complete school account when signing into iCloud in Settings on your device (go to Settings , then tap Sign in to your iPad).