Adobe app on iPad - student lab usage

I work at a college and we want to use fillable PDFs on iPads for our lab training.  We have edited PDFs for the students to use on the iPad.  Students will check off each step of their training and also have the ability to free draw and/or fill in blanks when appropriate.

The college uses Canvas as its online learning system.  We plan to link to the PDFs (it hasn't worked well to embed the PDF in Canvas) for students to utilize on the devices.  The other challenge is that the iPads will be shared throughout the day (i.e. we don't have an iPad assigned to each student).

Is the best approach to use the Adobe app?  If so, do the students only need to set up a free Adobe account?

Any other ideas?  We've invested time and money into the project, so we don't have much flexibility to make this work.