diff --git a/Gemfile.lock b/Gemfile.lock
index 75ddaf9..4b79af6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
       rexml (>= 3.3.9)
     phlex (1.11.0)
     phlexite (0.1.3)
-    rexml (3.4.0)
+    rexml (3.4.1)
 
 PLATFORMS
   x64-mingw-ucrt
@@ -17,4 +17,4 @@ DEPENDENCIES
   phlexite (~> 0.1.3)
 
 BUNDLED WITH
-   2.5.22
+   2.6.9
diff --git a/build.rb b/build.rb
index d75f834..6a1f91a 100644
--- a/build.rb
+++ b/build.rb
@@ -4,6 +4,7 @@ require 'phlex'
 require 'phlexite'
 require 'kramdown'
 
+require_relative 'lib/pages'
 require_relative 'views/base_layout'
 require_relative 'views/nav_links'
 require_relative 'views/section_link'
@@ -11,14 +12,7 @@ require_relative 'views/page_layout'
 require_relative 'views/pages/index'
 require_relative 'views/pages/markdown_page'
 
-def pages = [
-  ['concepts', 'Concepts of Biocircuits'],
-  ['simplest-circuit', "The Simplest Circuit"],
-  ['repressors', 'Repressors & Leaks'],
-  ['activators', 'Activators'],
-  ['hill-functions', 'Ultrasensitivity & the Hill Function'],
-  ['activators-vs-repressors', 'Choosing Between Activators & Repressors'],
-]
+def pages = BC.pages
 
 Phlexite::Site.new do |s|
   s.mount 'assets', on: '/assets'
diff --git a/lib/pages.rb b/lib/pages.rb
new file mode 100644
index 0000000..4f255c7
--- /dev/null
+++ b/lib/pages.rb
@@ -0,0 +1,10 @@
+module BC
+    def self.pages = [
+        ['concepts', 'Concepts of Biocircuits'],
+        ['simplest-circuit', "The Simplest Circuit"],
+        ['repressors', 'Repressors & Leaks'],
+        ['activators', 'Activators'],
+        ['hill-functions', 'Ultrasensitivity & the Hill Function'],
+        ['activators-vs-repressors', 'Choosing Between Activators & Repressors'],
+    ]
+end
\ No newline at end of file
diff --git a/views/pages/index.rb b/views/pages/index.rb
index ac9f30c..81917ed 100644
--- a/views/pages/index.rb
+++ b/views/pages/index.rb
@@ -4,14 +4,7 @@ module BC
   module Views
     module Pages
       class Index < ::Phlex::HTML
-        def sections = {
-          "1. Concepts of Biocircuits" => "/concepts.html",
-          "2. The Simplest Circuit" => "/simplest-circuit.html",
-          "3. Repressors & Leaks" => "/repressors.html",
-          "4. Activators" => "/activators.html",
-          "5. Ultrasensitivity & the Hill Function" => "/hill-functions.html",
-          "6. Choosing Between Activators & Repressors" => "/activators-vs-repressors.html"
-        }
+        def sections = BC.pages.each_with_index.map { |page, idx| ["#{idx + 1}. #{page[1]}", "/#{page[0]}.html"] }
 
         def view_template
           render(::BC::Views::BaseLayout.new("Home")) do