How to create an environment in which students can report teacher-student sexual harassment? I teach physics at a community college in California. A series of female students have told me about sexual harassment by the same tenured male math instructor. Two such incidents went like this.

one incident:

"Professor, I'm having trouble with my homework. Could you give me some help?"

"Sure, let's go have drinks and talk about it."

another incident:

"Professor, can I come to your office hours for help?"

"Sure. You know, my office is soundproof."

I reported the problem to the vice president who handles Title IX. She told me she needed the students to file formal complaints. In one of these incidents, the student was still enrolled in the guy's class. The VP said they could transfer her to another math class to protect her from retribution. I gave the students this information and suggested that they file complaints. A year later, it turns out that they haven't.

I suspect that almost no students at my school know how to go about reporting sexual harassment by a professor, and that almost none know that any measures could be taken to prevent retribution. My school is about to institute a mandatory online orientation, which will cover sexual harassment, but it treats sexual harassment as a general phenomenon and doesn't deal with any of the specific concerns, such as retribution, that arise when it's teacher-on-student harassment. I tried to convince the VP that we should do better outreach on this specific type of sexual harassment, e.g., with posters, including information about how students can be shielded against retribution. This seemed to make her very uncomfortable. I suspect that such a thing would upset interest groups such as the teachers' union.

A related aspect of the problem is that this is a community college, and it's a commuter school, so many students have weak ties to the institution and do not think of themselves primarily as students. The psychology is probably very different from what you see at elite four-year schools where you see this kind of thing.

How do schools create an environment in which students can and do report teacher-student sexual harassment? Are there best practices at other schools (possibly schools similar to mine) that should be emulated?
I refer you to the Student Conduct Administration &amp; Title IX:
Gold Standard Practices for Resolution of Allegations
of Sexual Misconduct on College Campuses report from the Association for Student Conduct Administration. While this report is specifically about responding to complaints about student-on-student sexual harassment, many of the "best practices" described there apply more generally. 

Some specifics from that document:


To better understand the climate on your campus, there is a list of "Questions to Ask Your Campus" on page 19 of the document mentioned above. These questions may help you identify the problems and a way forward for your specific college. (There is no one-size-fits all resolution to this problem.)
Find out if it is possible (e.g. for your Office of Institutional Research, if you have one) to conduct campus-wide climate surveys to understand whether existing efforts to inform students of sexual harassment policies and procedures are effective. If (as you suspect) they are not, this survey will serve as a baseline against which to judge the effectiveness of changes in how you present and disseminate these policies.
How comprehensible are your policies to your student body? Would your students feel the need to involve a attorney or a parent in order to understand the policies and procedures related to filing a sexual harassment claim? 
Make it easy to report sexual harassment. A campus should have several avenues through which students can report (phone, in-person, email, and online form, for example). 

To reduce the barrier to making a "formal complaint," make the student's first interaction as simple as possible:


  For example, if the first conversation includes something like, “You’re not going to want to go before a hearing board of three
  older faculty members that you might later have as instructors and discuss intimate details of your sex life,” that student is not likely to file a formal complaint.

Help students understand that even if they are not prepared to make a formal complaint, they can still get some relief from the situation (with "supportive measures" as they are known in Title IX). For example, in your scenario, the student should be allowed to change classes (and she should understand that she can transfer to another class) even if she is not ready to proceed with a formal complaint.
According to the April 2014 Q&amp;A Guidance on Title IX from the OCR, the school's written Title IX grievance procedures should explicitly include "sources of counseling, advocacy, and support" for students. Does your school's policies include these? Are they adequate?


Another useful document is How to Protect Students from Sexual Harassment: A Primer for Schools, from the National Women's Law Center.