Updated description of grading in syllabus

trying to make competency based grading clearer

assignments/index.md

@@ -24,6 +24,9 @@ questions or run into issue, please contact the course staff.
 | HW5: [Plain Language]({{site.baseurl}}/assignments/plain-language.html) | | Last week of class | 
 | HW7: [Final Project]({{site.baseurl}}/assignments/project.html)                            | TBD                                                                           | Multiple |
 
+# Regrades
+Regrades are done per competency, not per assignment. All regrade requests must be submitted at least a week ahead of the last class of the quarter. Please check with your TA about what exactly is required for a regrade for any given competency. 
+
 # Competencies 
 
 Assignment greading will be broken into two parts, as described in the [syllabus]({{site.baseurl}}/index.html). The first part will be completeness, which is 10% of your grade. The second part will be borken into competencies. Some of these are assessed only once, some multiple times. Your We have broken these into categories as described below.