Applying for assistant professor position, teaching statement required but I have no teaching experience
I do not have any formal, class-based teaching experience


The way you wrote this suggests that perhaps you have some informal teaching or tutoring experience.  If so, you can write about that.

You have years of experience observing teachers at work.  Think about what made the good ones effective, and what the bad ones did wrong.  You can use this analysis to create your draft teaching philosophy.



If you do not get this particular job, and you decide to continue applying for teaching jobs, then I suggest you get some teaching and tutoring experience under your belt as soon as possible.  It's okay to volunteer -- as long as you treat your volunteer teaching as seriously as you would treat a paid teaching or tutoring job.