Execute PowerShell script on Many Machines

I have a power shell script that I can execute on a list of machines. The script will run the list of machines in parallel. 
The script appears to run fine.  But, let's say I have 500 machines to run my power shell script on.

I plan to have 10 lists that have 50 machines each.  10 power scripts.  Each power shell script uses a list
of 50 machines. So each script executes on 50 machines at a time.

Is there a better way to do this?  I am new to power shell