diff --git a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md
index 0cb7a0939..18629ea3e 100644
--- a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md	
+++ b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md	
@@ -45,4 +45,5 @@ Fuel pellots. Small boys. Stacked into fuel elements 12 feet high. about 300 per
 14x14 lattice or 17x17. That is one fuel assembly.
 Zirconium is used as the cladding. Low neutron absorbtion cross section.
 Not all of the rods in the lattice are fuel. Sometimes they are, but also, sometimes they're control rods or instrumentation rods. 
-BWRs have smaller assemblies. Have water rods. Can be 'canned'
\ No newline at end of file
+BWRs have smaller assemblies. Have water rods. Can be 'canned'
+# Module 5.4 - Criticality Control