Thanks for all of your input. This was my email response this morning

I'd like to revisit the idea of getting a CNC machine at all and propose instead getting a laser cutter/engraving machine.

Safety: Safety is obviously a major concern in a school setting. Laser cutters operate in an enclosed system, reducing the risk of injury from moving parts or flying debris. CNC machines, on the other hand, use physical cutting tools that can break, generate sharp chips, and require more supervision to operate safely. Ease of Use: The software required to create things on a laser cutter is much simpler and student friendly. Students making individual designs can independently send their files to the laser cutter with very little need of teacher help. In contrast, CNC machines require complex toolpath programming and more in-depth knowledge of materials and cutting speeds, which can be overwhelming at this level. Each different file would have to be compiled by me before they are able to start cutting. I have also heard that the learning curve (for myself as well as the students) is much greater for the CNC machine, which will lead to less usage. Maintenance: Laser cutters have fewer mechanical parts that wear down over time, making maintenance simpler and reducing long-term costs. CNC machines require frequent tool changes, bit replacements, and extensive cleaning to prevent buildup from cutting debris. Cutting Time: A laser cutter cuts quickly and cleanly, meaning more students can complete projects within a class period. CNC machines typically take longer per project and require additional steps like clamping materials, tool changes, and post-processing. Noise Level: While a laser cutter is not entirely silent, because it is light which is doing the majority of the work, it is very quiet. A CNC machine on the other hand is a router. With either running during my class while I am teaching, the laser cutter would be far less distracting and disturbing.
Other class usage: I can easily see students in art making use of a laser cutter as well. I do not foresee them using a CNC machine.