If you have chosen a new theme, you may have noticed the navigation bar across the top or your blog. One of the items is "Links." In the old software your links were along side of your postings. Now you have a page for your web links.
If you have already created web links just click on the "Links" button at the top of your blog and you will see all of your links sorted by category. This is a nice feature for adding links for your students or parents to use.
You can "Add Links" under your Community Administration area by choosing "Add Links."