Do you use any teaching assistant tool in your CS1 lab classes?
When I was a TA, we used tools to automatically:


Collect submissions and run them against set of predefined test cases
Give instant feedback to students on how they did based on the test cases they passed/failed
Give feedback on the quality of their code
Generate plagiarism reports


For plagiarism, we used MOSS. For everything else, we developed a tool called AutoGradr.