diff --git a/book/Introduction/tableOC.md b/book/Introduction/tableOC.md
index 5fb797f..262f139 100644
--- a/book/Introduction/tableOC.md
+++ b/book/Introduction/tableOC.md
@@ -16,10 +16,10 @@ align: right
     7. Table of contents
 2. **Pedagogy**
     1. [Introduction](../Pedagogy/Introduction.md)
-    9. [Nature of Science](../Pedagogy/Nos.md)
-    10. [Argumentation](../Pedagogy/Argumentation.ipynb)
-    11. [Thinking-Back-and-Forth](../Pedagogy/BackAndForthThinking.md)
-    12. [Predict Explain Observe Explain](../Pedagogy/PoE.md)
+    2. [Nature of Science](../Pedagogy/Nos.md)
+    3. [Argumentation](../Pedagogy/Argumentation.ipynb)
+    4. [Thinking-Back-and-Forth](../Pedagogy/BackAndForthThinking.md)
+    5. [Predict Explain Observe Explain](../Pedagogy/PoE.md)
 
 **Demos on NOS**
 
diff --git a/book/_config.yml b/book/_config.yml
index 3c094a8..c3fec7f 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -57,5 +57,5 @@ sphinx:
  
   extra_extensions:
     - sphinx_exercise
-    - extensions.fa_extension # for fontawesome icons needed when converting to pdf
+