diff --git a/archives/01-introduction-to-computer-science-and-programming/README.md b/archives/01-introduction-to-computer-science-and-programming/README.md
index 39c7147..a6840d3 100644
--- a/archives/01-introduction-to-computer-science-and-programming/README.md
+++ b/archives/01-introduction-to-computer-science-and-programming/README.md
@@ -1,4 +1,4 @@
-# 01 - Introduction to Computer Science and Programming
+# 01. Introduction to Computer Science and Programming
 
 ➫ [Link to the original course](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-00sc-introduction-to-computer-science-and-programming-spring-2011/index.htm)
 
diff --git a/archives/01-introduction-to-computer-science-and-programming/archives/UNIT-01/01-introduction/README.md b/archives/01-introduction-to-computer-science-and-programming/archives/UNIT-01/01-introduction/README.md
index 6305b55..70cf900 100644
--- a/archives/01-introduction-to-computer-science-and-programming/archives/UNIT-01/01-introduction/README.md
+++ b/archives/01-introduction-to-computer-science-and-programming/archives/UNIT-01/01-introduction/README.md
@@ -1,4 +1,4 @@
-# 01. Introduction
+# 1.1.1 Introduction
 
 ⬅ [Back to table of contents](https://github.com/ericdouglas/MIT-computer-science/tree/master/archives/01-introduction-to-computer-science-and-programming#table-of-contents)
 
diff --git a/archives/01-introduction-to-computer-science-and-programming/archives/UNIT-01/02-core-elements-of-a-program/README.md b/archives/01-introduction-to-computer-science-and-programming/archives/UNIT-01/02-core-elements-of-a-program/README.md
index 4bb5cc5..bd8960d 100644
--- a/archives/01-introduction-to-computer-science-and-programming/archives/UNIT-01/02-core-elements-of-a-program/README.md
+++ b/archives/01-introduction-to-computer-science-and-programming/archives/UNIT-01/02-core-elements-of-a-program/README.md
@@ -1,4 +1,6 @@
-# Core Elements of a Program
+# 1.1.2 Core Elements of a Program
+
+⬅ [Back to table of contents](https://github.com/ericdouglas/MIT-computer-science/tree/master/archives/01-introduction-to-computer-science-and-programming#table-of-contents)
 
 This lecture covers the building blocks of straight line and branching programs: objects, types, operators, variables, execution, and conditional statements.