Unlike the INTO's site, there is little reason to go to ASTI's unless you are directly involved. It seems they are merely preaching to the converted and their web presence is, for the moment, a wasted opportunity. The internal search engine is good, if a little slow. The publications section is very busy, but once you click into the individual areas they can be difficult to read because of how they are laid out. A lot of the rest of the site is very dry, academic and could only interest the most ardent trade unionist.
Most people leave secondary school knowing a lot more than when they left primary.
However, in the case of the teachers' web sites, the secondary unions could learn a lot from their primary colleagues. The INTO's site is how a union site should look. The TUI's is about a third of the way there, but ASTI would do well to put some of the fortune they're spending on TV ads towards developing a website of use to their members and the public alike.