diff --git a/lectures/_toc.yml b/lectures/_toc.yml
index 164a4181b..4284de44a 100644
--- a/lectures/_toc.yml
+++ b/lectures/_toc.yml
@@ -72,14 +72,9 @@ parts:
   - file: jv
   - file: mccall_q
   - file: odu
-- caption: Consumption, Savings and Capital
+- caption: Household Problems
   numbered: true
   chapters:
-  - file: cass_koopmans_1
-  - file: cass_koopmans_2
-  - file: cass_fiscal
-  - file: cass_fiscal_2
-  - file: ak2
   - file: cake_eating_problem
   - file: cake_eating_numerical
   - file: optgrowth
@@ -97,6 +92,14 @@ parts:
   - file: perm_income
   - file: perm_income_cons
   - file: lq_inventories
+- caption: Optimal Growth
+  numbered: true
+  chapters:
+  - file: cass_koopmans_1
+  - file: cass_koopmans_2
+  - file: cass_fiscal
+  - file: cass_fiscal_2
+  - file: ak2
 - caption: Multiple Agent Models
   numbered: true
   chapters:
@@ -131,4 +134,4 @@ parts:
   chapters:
   - file: troubleshooting
   - file: zreferences
-  - file: status
\ No newline at end of file
+  - file: status