diff --git a/README.md b/README.md
index 3a872b9..268839b 100644
--- a/README.md
+++ b/README.md
@@ -29,8 +29,6 @@ is 40 lines of code for a 4-key keyboard.
 The sketch is small because the keybrd library takes care of the low-level details.
 It runs the breadboard keyboard in this picture.
 
-<img src="tutorials/keybrd_1_breadboard/breadboard_keyboard_2x2.JPG" title="breadboard keyboard" alt="breadboard keyboard" style="height:290px;width:328px;">
-
 <img src="tutorials/keybrd_1_breadboard/breadboard_keyboard_2x2.JPG" title="breadboard keyboard" alt="breadboard keyboard" height="290" width="328">
 
 Example complex keybrd sketch
diff --git a/tutorials/tutorial_1_breadboard_keyboard.md b/tutorials/tutorial_1_breadboard_keyboard.md
index 6d0c85d..ab73172 100644
--- a/tutorials/tutorial_1_breadboard_keyboard.md
+++ b/tutorials/tutorial_1_breadboard_keyboard.md
@@ -48,7 +48,7 @@ Electrostatic discharge (ESD) safety
 Static electricity can damage a microcontroller in ways that are hard to trouble shoot.
 
 I live in a desert on a carpeted floor and get zapped by door knobs regularly.
-Whenever I handle microcontrollers I:
+Here is the ESD precaution I take whenever I handle a microcontroller:
 
 1. Touch the bare metal on the back of my desktop computer (its grounded).
 2. Then while still touching to the computer, touch the metal USB connector case on the microcontroller.
diff --git a/tutorials/tutorial_8b_creating_and_publishing_your_own_keybrd_extension_library.md b/tutorials/tutorial_8b_creating_and_publishing_your_own_keybrd_extension_library.md
index 24d52d9..1cac230 100644
--- a/tutorials/tutorial_8b_creating_and_publishing_your_own_keybrd_extension_library.md
+++ b/tutorials/tutorial_8b_creating_and_publishing_your_own_keybrd_extension_library.md
@@ -37,10 +37,10 @@ Add your keybrd library to the Keyboard/Keypads sublist:
 Publishing on GitHub with listing on Arduino Library-Manager and Arduino Playground LibraryList
 -----------------------------------------------------------------------------------------------
 The advantage of using GitHub is that users can submit pull requests.
-The advantage of using Arduino Library-Manager is that users can install your library through the Arduino IDE.
+The advantage of using Arduino Library-Manager is that users can easily find and install your library through the Arduino IDE.
 
 Arduino Library-Manager is particular about the directory structures it accepts.
-Your keybrd extension library should have a library.properties file and a src folder, placed like this:
+A library.properties file and a src folder need to be placed in your keybrd extension library like this:
 
     keybrd_MyKeyboard/
         library.properties
@@ -58,8 +58,7 @@ Your keybrd extension library should have a library.properties file and a src fo
             class2.h
             ..
             instantiations_codes.h
-            instantiations_ports.h
-            instantiations_matrix.h
+            instantiations_rows.h
 
 The library.properties file is described in
     https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5:-Library-specification
@@ -73,7 +72,7 @@ Example library.properties file:
     sentence=An extension to the keybrd library for the MyKeyboard.
     paragraph=This library demonstrates my feature.
     category=Device Control
-    url= (instert your github repo URL for keybrd_MyKeyboard)
+    url= (instert your MyKeyboard github repo URL here)
     architectures=*
 ```