In Teachworks, invoices display each lesson as a single unit by default. However, you can customize the units used for lessons to display in "Hours" by following the steps below:
Click on "Account" and then click on "Account Settings".
Switch to the "Finance & Operations" tab.
Scroll down to the "Lesson-Specific Details" section.
Set the "Invoice Lesson Units" setting to "Hours".
Submit the form to save your changes.
NOTE: The "Create Invoice" form will still display each lesson as a single unit after the change. However, your invoices will now display the "Quantity" column in "Hours" when you view them after they've been created.