Hello @vsgreen829,
Currently the with the TP education plugin you can add the cost, size and age group but not the hour.
To add the new field in the backend need higher code customization as everything needs be fixed. So, if you require then you can always consider hiring the professional developer for this.
To hire a developer please refer to below given link:
http://themepalace.com/hire-a-customizer
Thank you.
Regards!!