How do I use tags?

When you are editing objects in Assess.ai, such as an Item, Test, Session or Examinee, you'll see a Add Tag field.  Click in this field and you will see a drop-down of available tags.  If you have 2 or more levels deep, they will be separated by a period (dot); this was selected because it is commonly used for educational standards such as the Common Core State Standards in the USA.  If you start typing, the drop-down will autocomplete, and automatically narrow the possibilities.

You can add multiple tags because they are orthogonal.  Here, a second tag has been added for Ethnicity.