--- a/mk	Tue Sep 01 15:57:55 2020 +0100
+++ b/mk	Tue Sep 01 16:00:37 2020 +0100
@@ -1,7 +1,7 @@
 #!/bin/sh
 set -e
 
-subdirs=${1:-"slides handouts hws coursework"} 
+subdirs=${1:-"slides handouts hws cws"} 
 
 for sd in $subdirs; do
   cd $sd