Updated doc files

Reference/InstructionalSites.md

@@ -0,0 +1,26 @@
+#Instructional Sites and Tools  
+
+##Tools  
+
+###Tinkercad  
+<https://www.tinkercad.com>  
+Basic CAD program to create circuit diagrams.   
+
+##IoT Instructional and Information Sites  
+
+###Sparkfun Learn  
+<https://learn.sparkfun.com/tutorials>   
+
+###Adafruit Tutorials  
+<https://learn.adafruit.com>  
+
+
+###Instructables
+<https://www.instructables.com>  
+Create an account with a school email address for free teacher/student access.   
+
+###HackaDay  
+<https://hackaday.com>.  
+Project ideas and interesting articles.   
+
+

Suppliers/IoTPartsSuppliers.md

@@ -1,14 +1,37 @@
-### IoT Parts Suppliers   
+# IoT Parts Suppliers   
+
 
 ###Sparkfun 
 Supplier for the Sparkfun Inventor's Kit (SIK), Qwiic devices, and other IoT parts.
 
  <https://www.sparkfun.com>      
  
- ###Adafruit
-Supplier for boards, displays, IoT parts, and the Adafruit Io IoT cloud.
+###Adafruit
+Supplier for boards, displays, IoT parts, and the Adafruit IoT cloud.
 
  <https://www.adafruit.com>      
  
+###Amazon  
+<https://www.amazon.com>   
+ 
+ Some items are more expensive than those from the suppliers. Check the prices.
 
+###Digikey  
+ <https://www.digikey.com>   
+ 
+###RobotShop  
+ <https://www.robotshop.com>   
+ 
+###dfRobot   
+ <https://www.dfrobot.com/product-2846.html>   
+ 
+###Viros  
+ <https://vilros.com>   
+ 
+###Element14 (Newark)
+<https://community.element14.com/>
+  
+###Canakit  
+ <https://www.canakit.com>
+