The second button is for weblinks. This button brings you to a menu of link resources for teachers, students and administrators. There is also a button that allows you to suggest a link to the site. Clicking on the teacher web resources button will bring you to a new menu or assorted links organized into several categories.
The Professional Learning button provides you with a list of opportunities from grants to teacher training. One of my favorite sections of ALEX is the Podcast treasury. Podcasts are such an amazing source of information. I can't wait to really delve into what they have in this section.
I found this website to be an excellent resource for teachers. I would certainly be excited to use this to find training opportunities and grants. I think it would also be an excellent resource for students. Students would be excited to be assigned a podcast to listen to once in a while in place of reading a chapter out of their books.