Student Project for Teacher Programs

I am a graduate student at SAIC in the MAAE program and I am doing research to develop a site for the teacher's program at Art Institute of Chicago. We want to create a site that serves as a resource and a community where educators can engage with one another. Here are some questions that you guys can answer to help me gain ideas. No need to answer all the questions, but if you do that would be so helpful. 

1. Why do you use this site/resource? What features do you find most useful in terms of staying connected to a community of educators/practitioners?
2. Do you know of other sites/resources/platforms that museums or educational communities are using that you would recommend? Why? What about those you would not recommend? Why not?
3. How much involvement/engagement are you comfortable with in an online community? Are there tools that you wish existed that don’t?
4. What recommendations would you give to a cultural organization that wishes to get better connected to its community of users online?

Thanks for the help.