Please update your Education WordPress theme from Themeforest. If you don't know how to auto update themeforest theme follow this article How to update Themeforst WordPress theme automatically.
Once Updated you will get option to select columns in teachers for Grid view only this option will not work with Carousel because carousel is ineffective with columns less than 2.
New Our Teachers module will look like this select 1 From this teachers module in your EduBox education WordPress theme.

After this your theme will start displaying 1 column for teacher or single teacher. But that will look very big and stretched so its good idea to manage your row, use row with 3 columns and in center column you can post your single teacher. Like below.

That's it Note: you can drag columns left and column right to adjust their width so you can have desired width of your teachers column.