diff --git a/_config.yml b/_config.yml
index 41f35ad1..2920c29a 100644
--- a/_config.yml
+++ b/_config.yml
@@ -23,6 +23,7 @@ sphinx:
     html_js_files:
     - https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.4/require.min.js
     mathjax_path: https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
+    html_extra_path: ['lectures/103-Firas-lectures/files']
 latex:
   latex_documents:
     targetname: book.tex
diff --git a/_toc.yml b/_toc.yml
index a0ecb4be..05afb8c1 100644
--- a/_toc.yml
+++ b/_toc.yml
@@ -59,11 +59,21 @@ parts:
       - file: lectures/101-Giulia-lectures/08_hyperparameter-optimization.ipynb
       - file: lectures/101-Giulia-lectures/09_classification-metrics.ipynb
       - file: lectures/101-Giulia-lectures/10_regression-metrics.ipynb
+      - file: lectures/101-Giulia-lectures/12_ensembles.ipynb
+      - file: lectures/101-Giulia-lectures/13_feat-importances
+      - file: lectures/101-Giulia-lectures/14_feature-engineering-selection
+      - file: lectures/101-Giulia-lectures/15_K-Means
+      - file: lectures/101-Giulia-lectures/16_DBSCAN-hierarchical
       - url: "https://firasm.github.io/cpsc330-slides/slides-17"
         title: Lecture 17
       - url: "https://firasm.github.io/cpsc330-slides/slides-18"
         title: Lecture 18
-
+      - file: lectures/101-Giulia-lectures/19_intro_to_computer-vision
+      - file: lectures/101-Giulia-lectures/20_time-series
+      - file: lectures/101-Giulia-lectures/21_survival-analysis
+      - file: lectures/101-Giulia-lectures/22_communication
+      - file: lectures/103-Firas-lectures/lec23
+        title: Lecture 23
   - file: lectures/102-Varada-lectures/README
     sections:
       - url: "https://kvarada.github.io/cpsc330-slides/lecture-01.html"
@@ -108,12 +118,12 @@ parts:
         title: Lecture 20                        
       - url: "https://kvarada.github.io/cpsc330-slides/lecture-21.html"
         title: Lecture 21                        
-    # - url: "https://kvarada.github.io/cpsc330-slides/lecture-22.html"
-    #   title: Lecture 22                        
-    # - url: "https://kvarada.github.io/cpsc330-slides/lecture-23.html"
-    #   title: Lecture 23                        
-    # - url: "https://kvarada.github.io/cpsc330-slides/lecture-24.html"
-    #   title: Lecture 24                                
+      - url: "https://kvarada.github.io/cpsc330-slides/lecture-22.html"
+        title: Lecture 22                        
+      - file: lectures/103-Firas-lectures/lec23
+        title: Lecture 23
+      - url: "https://kvarada.github.io/cpsc330-slides/lecture-24.html"
+        title: Lecture 24                                
   - file: lectures/103-Firas-lectures/README
     sections:
       - url: "https://firasm.github.io/cpsc330-slides/slides-01-intro"
@@ -154,12 +164,12 @@ parts:
         title: Lecture 19
       - url: "https://firasm.github.io/cpsc330-slides/slides-20"
         title: Lecture 20
-      # - url: "https://firasm.github.io/cpsc330-slides/slides-21"
-      #   title: Lecture 21
-      # - url: "https://firasm.github.io/cpsc330-slides/slides-22"
-      #   title: Lecture 22
-      # - url: "https://firasm.github.io/cpsc330-slides/slides-23"
-      #   title: Lecture 23
+      - url: "https://firasm.github.io/cpsc330-slides/slides-21"
+        title: Lecture 21
+      - file: lectures/103-Firas-lectures/lec22
+        title: Lecture 22
+      - file: lectures/103-Firas-lectures/lec23
+        title: Lecture 23
       - url: "https://firasm.github.io/cpsc330-slides/slides-24"
         title: Lecture 24
 - caption: Attribution
diff --git a/lectures/103-Firas-lectures/files/lec22_Communication.pdf b/lectures/103-Firas-lectures/files/lec22_Communication.pdf
new file mode 100644
index 00000000..273d1c30
Binary files /dev/null and b/lectures/103-Firas-lectures/files/lec22_Communication.pdf differ
diff --git a/lectures/103-Firas-lectures/files/lec23_AIcsCoreFairness.pdf b/lectures/103-Firas-lectures/files/lec23_AIcsCoreFairness.pdf
new file mode 100644
index 00000000..9776c525
Binary files /dev/null and b/lectures/103-Firas-lectures/files/lec23_AIcsCoreFairness.pdf differ
diff --git a/lectures/103-Firas-lectures/lec22.md b/lectures/103-Firas-lectures/lec22.md
new file mode 100644
index 00000000..eebcef4f
--- /dev/null
+++ b/lectures/103-Firas-lectures/lec22.md
@@ -0,0 +1,7 @@
+# Lecture 22
+
+<div>
+<iframe src="../../lec22_Communication.pdf" width="100%" height="600px" frameBorder="0"> </iframe>
+</div>
+
+- [Download the Lecture slides here as a PDF](../../lec22_Communication.pdf)
\ No newline at end of file
diff --git a/lectures/103-Firas-lectures/lec23.md b/lectures/103-Firas-lectures/lec23.md
new file mode 100644
index 00000000..2deb406b
--- /dev/null
+++ b/lectures/103-Firas-lectures/lec23.md
@@ -0,0 +1,7 @@
+# Lecture 23
+
+<div>
+<iframe src="../../lec23_AIcsCoreFairness.pdf" width="100%" height="600px" frameBorder="0"> </iframe>
+</div>
+
+- [Download the Lecture slides here as a PDF](../../lec23_AIcsCoreFairness.pdf)
\ No newline at end of file