Correct instructions on index page

Author: tmarnell

index.md

@@ -9,12 +9,12 @@ This is the homepage of the course.
 
 ## Adding Pages
 
-Add and edit pages within the /pages directory. [Example]({{ "page" | absolute_url}})
+Add and edit pages within the /_pages directory. [Example]({{ "page" | absolute_url}})
 
 Set the titles, permalinks, and order in the frontmatter. (Between the lines of three dashes at the top.)
 
-All pages will appear in the menu to the left. For example, the page with an order of 1 will appear first in the list.
+All pages will appear in the menu to the left. For example, the page with an order of 1 will appear first in the list, followed by the page with an order of 2, etc.
 
 ## Markdown
 
-All pages are written in Markdown. See [Basic Syntax](https://www.markdownguide.org/basic-syntax/)
+All pages are written in Markdown. See [Basic Syntax](https://www.markdownguide.org/basic-syntax/)