From my 6 years of teaching experience, I can tell you that it is always better to use a classroom management tool that allows you to conduct classes smoothly with an authorized list of applications and websites. My school administration has been using Faronics Insight for quite some time and we are quite happy with the results. I can monitor the activities on all students' devices from my own computer and even control them remotely, if necessary. If any student is found to be distracted, I can blank out his/her screen and disable their keyboards and mice to catch their attention.
This classroom management software runs well a variety of devices, such as any Windows/Mac computers, Chromebooks, and tablets. I can prepare a list of approved applications and websites, that are educational and grade-specific. It also allows me to keep a track of what applications are running on each student's workstation, and add/remove any of them as per class requirements. Looking at your lab management concerns, I think you will find it beneficial.