I'm sure it varies by state but in Florida CIs only get CEUs if they are a credentialed clinical instructor by the APTA.. and with that I get 2 CEUs for an 8 week internship.
Not all students are great students and some have the potential of making your job that much harder. If you have a good student, yes your life and job will be easier.
I also refuse to see students as free labor. My job is to ensure ensure they know what they are doing and why they are doing it but to also teach further information or treatment ideas which I have learned from my experience. Personally I am huge on time management myself and I instill this on students; that they have to get the documentation done on time. Students don't get paid overtime and I don't want them (or me) staying late.