VBA Code to read Files

Hi,

I have a pretty time consuming project due tomorrow and I'm looking for some guidance on the fastest way to pull this off. I am sending an excel file containing four tabs (Block 1, Block 2, Block 3, Block 4) to 20 folks. Once they fill in scores, each of them will email me their files back. I have created a "Master" file for myself and the plan is to copy/paste the data 80 times (4 tabs X 20 attendees). I know there is an easier way to do this, but I don't know much VBA code. Is there a way I can dump all the files in a folder and have excel read and populate the data on my "Master File"? All the data is the exact same on all 20 spreadsheets with the exception of the scores and names of course. I have attached the template going to the attendees and what my "Master" file should look like. Any help is greatly appreciated.

Niki