Follow these steps:
  1. Open Excel
  2. Select File > Options > Trust Center > Trust Center Setting > Protected View
  3. Unmark “Enable Protected View for files originating from the Internet”
The following article provides information on how to troubleshoot this issue from Microsoft: Excel opening blank when you double-click a file icon or file name.  

We recommend working with your IT specialist at your school to complete this process, as they are more familiar with your school's setup. 

Note: We provide links to third-party websites in an effort to help you resolve your issue. We are not responsible for the information on third-party websites and we cannot assist with implementing resolutions from these websites.