diff --git a/_modules/week-04.md b/_modules/week-04.md
index d2bd9fb..2d4a081 100644
--- a/_modules/week-04.md
+++ b/_modules/week-04.md
@@ -5,6 +5,7 @@ title: Week 4
 Sep 17
 : **Lecture 6**{: .label .label-lecture} [Regex](lecture/lec06)
     : [Note 6](https://ds100.org/course-notes/regex/regex.html)
+: **Lecture Participation 6**{: .label .label-survey } [Lecture Participation 6](https://app.sli.do/event/rsUHs9fC9TdGkQs6yV4e3e/embed/polls/5b7d8aed-2306-452c-b86b-661ecd29f22a)
 : **Discussion 3**{: .label .label-disc } [Pandas II, EDA](https://drive.google.com/file/d/1_Vdx0mSN1tIvcS_Ggh8EHdJtm6-qnG02/view?usp=sharing){:target="_blank"}
     : [Mini-Lecture](https://www.youtube.com/watch?v=9jFqjbPLThc&list=PLQCcNQgUcDfplNp0itu2QqVjoDE9u5iow&index=3)