diff --git a/Notes/03_Program_organization/01_Script.md b/Notes/03_Program_organization/01_Script.md
index 07bc91dd9..11fdb1809 100644
--- a/Notes/03_Program_organization/01_Script.md
+++ b/Notes/03_Program_organization/01_Script.md
@@ -102,7 +102,7 @@ def bar(x):
     statements
 
 # OR
-def bar(x)
+def bar(x):
     statements
 
 def foo(x):
diff --git a/Notes/05_Object_model/01_Dicts_revisited.md b/Notes/05_Object_model/01_Dicts_revisited.md
index 777d2843c..52760303c 100644
--- a/Notes/05_Object_model/01_Dicts_revisited.md
+++ b/Notes/05_Object_model/01_Dicts_revisited.md
@@ -248,7 +248,7 @@ You can view it.
 >>>
 ```
 
-This chain is called the **Method Resolution Order**.  The find an
+This chain is called the **Method Resolution Order**.  To find an
 attribute, Python walks the MRO in order. The first match wins.
 
 ### MRO in Multiple Inheritance
diff --git a/Notes/07_Advanced_Topics/00_Overview.md b/Notes/07_Advanced_Topics/00_Overview.md
index 74005f17e..dacbcfa2a 100644
--- a/Notes/07_Advanced_Topics/00_Overview.md
+++ b/Notes/07_Advanced_Topics/00_Overview.md
@@ -1,4 +1,4 @@
-[Contents](../Contents.md) \| [Prev (6 Generators)](../06_Generators/00_Overview.md) \| [Next (8 Testing and Debugging](../08_Testing_debugging/00_Overview.md)
+[Contents](../Contents.md) \| [Prev (6 Generators)](../06_Generators/00_Overview.md) \| [Next (8 Testing and Debugging)](../08_Testing_debugging/00_Overview.md)
 
 # 7. Advanced Topics
 
diff --git a/Notes/07_Advanced_Topics/01_Variable_arguments.md b/Notes/07_Advanced_Topics/01_Variable_arguments.md
index cc1f9efb0..6fe66ba0a 100644
--- a/Notes/07_Advanced_Topics/01_Variable_arguments.md
+++ b/Notes/07_Advanced_Topics/01_Variable_arguments.md
@@ -92,7 +92,7 @@ numbers = (2,3,4)
 f(1, *numbers)      # Same as f(1,2,3,4)
 ```
 
-Dictionaries can also be expaded into keyword arguments.
+Dictionaries can also be expanded into keyword arguments.
 
 ```python
 options = {
diff --git a/Notes/08_Testing_debugging/00_Overview.md b/Notes/08_Testing_debugging/00_Overview.md
index 37841d93c..d1c1bbc6a 100644
--- a/Notes/08_Testing_debugging/00_Overview.md
+++ b/Notes/08_Testing_debugging/00_Overview.md
@@ -1,6 +1,6 @@
 [Contents](../Contents.md) \| [Prev (7 Advanced Topics)](../07_Advanced_Topics/00_Overview.md) \| [Next (9 Packages)](../09_Packages/00_Overview.md)
 
-# 8. Overview
+# 8. Testing and debugging
 
 This section introduces a few basic topics related to testing,
 logging, and debugging.
diff --git a/Notes/09_Packages/01_Packages.md b/Notes/09_Packages/01_Packages.md
index 24fcb35fe..96133bed8 100644
--- a/Notes/09_Packages/01_Packages.md
+++ b/Notes/09_Packages/01_Packages.md
@@ -243,7 +243,7 @@ package. One level up.
 
 ```python
 #!/usr/bin/env python3
-# porty-add/script.py
+# porty-app/script.py
 import sys
 import porty
 
diff --git a/Notes/Contents.md b/Notes/Contents.md
index ef7299266..57199d7c0 100644
--- a/Notes/Contents.md
+++ b/Notes/Contents.md
@@ -16,7 +16,7 @@
 Please see the [Instructor Notes](InstructorNotes.md) if you plan on
 teaching the course.
 
-[Home](..)
+[Home](../README.md)
 
 
 
diff --git a/README.md b/README.md
index e9538de6e..21efa4540 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,8 @@ in-person groups since 2007.  Traders, systems admins, astronomers,
 tinkerers, and even a few hundred rocket scientists who used Python to
 help land a rover on Mars--they've all taken this course. Now, I'm
 pleased to make it available under a Creative Commons license. Enjoy!
-[GitHub Repo](https://github.com/dabeaz-course/practical-python).
+
+[GitHub Pages](https://dabeaz-course.github.io/practical-python) | [GitHub Repo](https://github.com/dabeaz-course/practical-python).
 
 --David Beazley ([https://dabeaz.com](https://dabeaz.com)), [@dabeaz](https://twitter.com/dabeaz)
 
diff --git a/Solutions/1_10/mortgage.py b/Solutions/1_10/mortgage.py
index 9d85119ad..dabd94fc3 100644
--- a/Solutions/1_10/mortgage.py
+++ b/Solutions/1_10/mortgage.py
@@ -15,7 +15,7 @@
     principal = principal * (1+rate/12) - payment
     total_paid = total_paid + payment
 
-    if month >= extra_payment_start_month and month < extra_payment_end_month:
+    if month > extra_payment_start_month and month <= extra_payment_end_month:
         principal = principal - extra_payment
         total_paid = total_paid + extra_payment