I am concerned about jotform performance for a large number of viewers.

I am an online tutor and would like to use jotform to post lessons for my students.

I am concerned about the load time and jotform performance for a viewing audience of 1500 students.

Can jotform handle this kind of load?

JotForm forms can definitely handle 1,500 simultaneous viewers.  We have had forms take in tens of thousands of submissions over a few hours.  There should be no problem at all with 1,500.