Thank you for using our Education WordPress theme.
Here is the answer for your questions
1) Please edit the page where you are listing the staff members. Once you are in the page Please edit the module Our Teachers just take your mouse over our teachers and click on edit icon. Now in options you can easily locate this option >> Disable Read More Button Check this option. Now scroll down the same module dailgue box and you will find the option to enter Excerpt length please enter the length you want to display for teacher's description.
If you do not see options in editing the page then you are seeing your teachers in default post view which cannot help you to change these items i suggest you to create a page and add the our teachers module and enter your desired settings to that.
2) Please edit the page in wp-admin so you can change the width of row. Please note right now you are using 3 colums you can use 2 columns by editing our teachers module which will increase the width of each column to 50% if you want to keep width same and just centeralize these two elements. Then click on edit on row and in row settings you can center the elements and give a fix width to row as well. Let me know if you have further questions.