I think some really biting editorials would help. An article on standardized testing, the advantages or disadvantages of retention, the use of corporal punishment, inequitable funding between urban,suburban, and rural schools, and so forth - with links to the site so people could post their responses would help to generate activity.
Question: Who is this newsletter for? The members? If it's for members only, the articles would be redundant don't you think? And if it's not just for members, how would you go about mailing it? And would this then be considered SPAM?
Speaking for myself - the only SPAM I really like is the type that comes in those little cans in the supermarket. I eat them fried with eggs and hashbrowns for breakfast. (You can never have too much cholesterol in your diet - heh-heh-heh).