diff --git a/courses/AIProj.md b/courses/AIProj.md
index 9214c7680944871d03fed45cf6d363d4032d7976..072174b148cd58d50913a1c84170f46b5f47b429 100644
--- a/courses/AIProj.md
+++ b/courses/AIProj.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: Projekt zur Künstlichen Intelligenz
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 semesters: 
     - WS17/18
diff --git a/courses/KRMT.md b/courses/KRMT.md
index c1da941203d3ee813f2c628f910ee1beb3783526..7b8ea74ad811b7e901cb78223f456c4b020bc4e1 100644
--- a/courses/KRMT.md
+++ b/courses/KRMT.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: Logik-Basierte Wissensrepräsentation für Mathematisch/Technisches Wissen
-instructor: mkohlhase
+instructor:
+	- omkohlhase
 
 semesters:
     - SS17
diff --git a/courses/ai.md b/courses/ai.md
index b53164e92cdff2e7aa722875598e64da14d0939a..3baeb291b05000caaea85eb2833453a37201e3fb 100644
--- a/courses/ai.md
+++ b/courses/ai.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: Artificial Intelligence
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/ai1.md b/courses/ai1.md
index dd32ee690a1078dd12a753c44567550a50d405dd..6ffb4686689fcd6c9f1bf94fb77d569ba638a139 100644
--- a/courses/ai1.md
+++ b/courses/ai1.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: Künstliche Intelligenz I
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 semesters:
     - WS16/17
diff --git a/courses/ai2.md b/courses/ai2.md
index 9590900c6219a6e5cfad9a43ba6a713f51403647..742df1a3e2db951e5116c02856612874971c536a 100644
--- a/courses/ai2.md
+++ b/courses/ai2.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: Künstliche Intelligenz II
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 semesters:
     - SS17
diff --git a/courses/dbwa.md b/courses/dbwa.md
index 95f727ffc167236b073570eb8220f8b97d5a4d28..da336d338797e5b76172b0c02f507b8011ffabf8 100644
--- a/courses/dbwa.md
+++ b/courses/dbwa.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: Data Bases and Web Applications
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/dynamics.md b/courses/dynamics.md
index 1ecb4daca601b981560cf6f16548cd27014872ae..176ec62a55471935013b09c86ada3a10ed4d4528 100644
--- a/courses/dynamics.md
+++ b/courses/dynamics.md
@@ -2,8 +2,8 @@
 layout: course
 
 title: Representing Dynamics and Dynamic Representation 
-instructor: mkohlhase
-co-instructors:
+instructor:
+	- mkohlhase
     - Herber Jaeger, Jacocbs University
 
 organization: Jacobs University
diff --git a/courses/gencs.md b/courses/gencs.md
index 53bd26bccfaee88d688505138f8832a62142d37c..170fcc7d71067238cfe3d28facaae12f2c3feb5d 100644
--- a/courses/gencs.md
+++ b/courses/gencs.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: General Computer Science
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/gencs1.md b/courses/gencs1.md
index 8edd66a9025c011325c128954909d5b754c165e6..279b1a67335481af08b3b74a864fd3b03ffe515a 100644
--- a/courses/gencs1.md
+++ b/courses/gencs1.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: General Computer Science I
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/gencs2.md b/courses/gencs2.md
index db699b7923803f73e0f83f719fc92ec1be66a940..443966cbd8146a4dd263efaf2c5ec05db826e61a 100644
--- a/courses/gencs2.md
+++ b/courses/gencs2.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: General Computer Science II
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 organization: Jacobs University
 semesters:
diff --git a/courses/lbs.md b/courses/lbs.md
index 9b5e85461a99255a29c54610561666a88e5e01fe..ee5a768a8cce9ce22d952ad8ea123295e407b0bd 100644
--- a/courses/lbs.md
+++ b/courses/lbs.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: Logik-Basierte Sprachverarbeitung (LBS)
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 semesters:
     - WS17/18
diff --git a/courses/tdm.md b/courses/tdm.md
index ccbddb05de0bf09d425f3753c5bf9942f97b2d22..8feee564cb23e6ecdc45404af3979eeda169cf3f 100644
--- a/courses/tdm.md
+++ b/courses/tdm.md
@@ -2,8 +2,8 @@
 layout: course
 
 title: University Study Course: Text and Digital Media
-instructor: mkohlhase
-co-instructors:
+instructor:
+	- mkohlhase
     - Prof. Thomas Rommel, Jacobs University
 
 organization: Jacobs University
diff --git a/courses/wuv.md b/courses/wuv.md
index 63c9b6343238a9acad1d92ad68859fe982d9f424..88285e34c798319c36ad3ade2b5690814f5831ff 100644
--- a/courses/wuv.md
+++ b/courses/wuv.md
@@ -2,7 +2,8 @@
 layout: course
 
 title: Seminar Wissensrepräsentation und -verarbeitung
-instructor: mkohlhase
+instructor:
+	- mkohlhase
 
 semesters:
     - SS17