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+++ b/Readme.md
@@ -101,6 +101,8 @@ Concepts Covered:
 
 Up to now we have used 2D software. In this introduction we look at the advantages of 3D software for creation of constructable projects. We learn about the parametric modeling, and how it can help us iterate on designs.
 
+![TabsSlots](./class4.png)
+
 * Learn to sketch and design in CAD
 * Make objects that can be easily adjusted, customized, and cut on the laser
 
@@ -119,6 +121,8 @@ Concepts Covered:
 
 In this second part of CAD for lasers we learn how to design and create perfect joints and attachment points in our constructable objects.
 
+![Box](./class5.png)
+
 * Plan and create connection points
 * Design parametric features
 
@@ -139,6 +143,7 @@ Concepts Covered:
 
 Expand our knowledge of constructable shapes into the wide world of bendable materials - papercraft, textiles, and leather.
 
+![Lantern](./class6.png)
 
 * Learn to use a Sheetmetal workbench for a variety of designs 
 * Plan fold lines, tabs, and other bendable features
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