diff --git a/Colour.md b/Colour.md
index d12c3f6..7fd0776 100644
--- a/Colour.md
+++ b/Colour.md
@@ -1,6 +1,4 @@
 
-# Introduction
-
 Blockly users can choose, create, and blend colours.  Colours are primarily used in [the turtle graphics application](https://blockly-demo.appspot.com/static/apps/turtle/index.html) but are also available in [the coding application](https://blockly-demo.appspot.com/static/apps/code/index.html).  Note that we use the British spelling of "colour".
 
 # Blocks
diff --git a/Home.md b/Home.md
index 709b35c..81a26bd 100644
--- a/Home.md
+++ b/Home.md
@@ -1 +1,15 @@
-Welcome to the blockly wiki!
+# Blockly Block Wiki
+
+Blockly has a large number of blocks.  They are divided into the following categories:
+
+  * [Logic](Logic) (including [If/Else](IfElse))
+  * [Loops](Loops)
+  * Math
+  * [Text](Text)
+  * [Lists](Lists)
+  * [Colour](Colour)
+  * [Variables](Variables)
+  * Functions
+
+A Blockly application will choose which (if any) of these default blocks are present.
+Additionally, most applications will also create their own custom blocks.
diff --git a/IfElse.md b/IfElse.md
index f6e0cae..6669b08 100644
--- a/IfElse.md
+++ b/IfElse.md
@@ -1,6 +1,4 @@
 
-# Introduction
-
 Conditional statements are central to computer programming.  They make it possible to express statements like:
   * If there is a path to the left, turn left.
   * If score = 100, print "Well done!".
diff --git a/Lists.md b/Lists.md
index 482d782..43f145d 100644
--- a/Lists.md
+++ b/Lists.md
@@ -1,6 +1,4 @@
 
-# Introduction
-
 As in everyday speech, a Blockly list is an ordered collection of items, such as a "to do" list or a shopping list.  Items in a list may be of any type, and the same value may appear more than once in a list.
 
 # List Creation
diff --git a/Logic.md b/Logic.md
index 5597196..e8f036c 100644
--- a/Logic.md
+++ b/Logic.md
@@ -1,11 +1,9 @@
 
-# Introduction
-
 [Boolean algebra](https://en.wikipedia.org/wiki/Boolean_algebra) is a mathematical system that has two values:
   * **true**
   * **false**
 
-Boolean values (also called _conditions_) are used in these control block, which contain examples::
+Boolean values (also called _conditions_) are used in these control block, which contain examples:
   * [conditional blocks](IfElse)
   * [repeat blocks](Loops#repeat)
 
diff --git a/Loops.md b/Loops.md
index 820f4da..7255730 100644
--- a/Loops.md
+++ b/Loops.md
@@ -1,6 +1,4 @@
 
-# Introduction and Terminology
-
 The **Control** category holds blocks that control whether other blocks placed in their **body** are run.  (For example, in the below "repeat" block, the body contains the "print" block and its input.)  There are two types of control blocks: [IfElse](IfElse) (described on their own page) and these, which control how many times the body is run and, in some cases, the value of a variable used within the body.  These structures are called **loops** since the body is repeated (possibly) multiple times, reminiscent of a rope containing loops.    Each pass through the loop is called an **iteration**.  (How about our using the term "pass"?)  For more information, see https://en.wikipedia.org/wiki/Control_flow#Loops.
 
 # Blocks for Loop Creation
diff --git a/Text.md b/Text.md
index fb8e684..4879ddb 100644
--- a/Text.md
+++ b/Text.md
@@ -1,6 +1,4 @@
 
-# Introduction
-
 Examples of pieces of text are:
   * "thing #1"
   * "March 12, 2010"
diff --git a/Variables.md b/Variables.md
index 266d74e..99f9b43 100644
--- a/Variables.md
+++ b/Variables.md
@@ -1,6 +1,4 @@
 
-# Introduction
-
 We use the term _variable_ the same as it is used in mathematics and in other programming languages: a named value that can be changed (varies).  Variables can be created in several different ways.
   * Every [count with](Loops#count_with) and [for each](Loops#for_each) block uses a variable and defines its values.  These values can only be used within the block.  A traditional computer science term for these are [loop variables](https://en.wikipedia.org/wiki/Loop_variable).
   * User-defined functions (also known as "procedures") can define inputs, which creates variables that can be used only within the function.  These are traditionally called "[parameters](https://en.wikipedia.org/wiki/Parameter)" or "arguments".