diff --git a/Readme.md b/Readme.md
index 1dac457..cd2b73a 100644
--- a/Readme.md
+++ b/Readme.md
@@ -12,7 +12,15 @@ Walk through the entire process of creating an automation intended for assembly.
 * Construction Geometry
 * Profiles
 
-### Problem Solving - Week 3
+### Multi-body Modelling - Week 3
+Learn more advanced techniques for creating designs with multiple interconnected parts. Optimize CAM operations for designs involving multiple pieces.
+
+* Shape Binders
+* Pattern operations
+* Arrays
+* Multi-body CAM
+
+### Problem Solving - Week 4
 Learn to design for, and correct problems commonly encountered in building for CNC.
 
 * Dressups
@@ -21,7 +29,7 @@ Learn to design for, and correct problems commonly encountered in building for C
 * Surfacing operations
 
 
-### Joints and Helper Objects - Week 4
+### Joints and Helper Objects - Week 5
 Go in-depth on creating joints that can be produced on a CNC machine, and learn to use helper objects for solving tricky problems.
 
 * Dovetail joints
@@ -30,16 +38,9 @@ Go in-depth on creating joints that can be produced on a CNC machine, and learn
 * Mortise and Tenon joints
 * Lap Joints
 
-### Importing Exchange Formats
+### Importing Exchange Formats - Week 6
 Learn to work with designs created in other software, prepping them for production by CNC machine.
 
 * Working with STEP files
 * Working with SVG/DXF files
 
-### Multi-body Modelling
-Learn more advanced techniques for creating designs with multiple interconnected parts. Optimize CAM operations for designs involving multiple pieces.
-
-* Shape Binders
-* Pattern operations
-* Arrays
-* Multi-body CAM
\ No newline at end of file
diff --git a/week3/ParametricBox.FCStd b/week3/ParametricBox.FCStd
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diff --git a/week3/StackableParametricBox.FCStd b/week3/StackableParametricBox.FCStd
new file mode 100644
index 0000000..5c76d25
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