you don't NEED to buy a laptop for an EMT class; you likely WILL need some computer, to do assignments.
That being said, I'm not a big fan of having laptops in EMT class (and I say that as an instructor who ALWAYS brings his laptop to EMT classes). They are simply too distracting, with social media, and internet access, and a whole bunch of other stuff. But If a student is actually using it to take notes, and be productive, than more power to them. I think there is very little needs for a laptop, especially to purchase a new laptop, for EMT class.
If you are going to college, especially away to college, than I would absolutely invest in a laptop. back in the day, I only used desktops, and RDPed into my desktop from any on campus computer when I lived on campus. but when I got a laptop, and had all my files at my fingertips...... well, it was worth it. I've had my laptop for at least 8 years now, and have upgraded the HD (and am looking to do so again to a hybrid SSD one), and the memory (which has allowed me to keep it for so long), but now I might just buy a new one. Its a worthwhile investment for any college student.