1. Navigate to My account → School Plan.
2. Select Yearly or Monthly.
3. Click on Downgrade of the desired plan.
Note 1: At the moment of the downgrade, the plan is changed immediately to the plan you have selected and a new invoice is being issued to depict the change.
Note 2: When downgrading, the difference of the previously paid invoice will be saved as Credits and will be used for the next invoices.