diff --git a/_includes/sidebar2.html b/_includes/sidebar2.html
index ab2abb9dd0..2b9e1a0cd5 100644
--- a/_includes/sidebar2.html
+++ b/_includes/sidebar2.html
@@ -25,13 +25,13 @@
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/planning-exercises">Chapter 10 - Classical Planning</a>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/advanced-planning-exercises">Chapter 11 - Planning and Acting in Real Life</a>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/kr-exercises">Chapter 12 - Knowledge Representation</a>
-  <span class="sidebar-nav-item">Part - IV Uncertaing Knowledge and Reasoning</span>
+  <span class="sidebar-nav-item">Part - IV Uncertain Knowledge and Reasoning</span>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/probability-exercises">Chapter 13 - Quantifying Uncertainty</a>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/bayes-nets-exercises">Chapter 14 - Probabilistic Reasoning</a>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/dbn-exercises">Chapter 15 - Probabilistic Reasoning Over Time</a>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/decision-theory-exercises">Chapter 16 - Making-Simple Decisions</a>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/complex-decisions-exercises">Chapter 17 - Making Complex Decisions</a>
-  <span class="sidebar-nav-item">Part - V Lerning</span>
+  <span class="sidebar-nav-item">Part - V Learning</span>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/concept-learning-exercises">Chapter 18 - Learning From Examples</a>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/ilp-exercises">Chapter 19 - Knowledge In Learning</a>
   <a class="sidebar-nav-item" href="{{ site.baseurl }}/bayesian-learning-exercises">Chapter 20 - Learning Probabilistic Models</a>