diff --git a/app/controllers/studies_controller.rb b/app/controllers/studies_controller.rb
index ff32701..f0e716a 100644
--- a/app/controllers/studies_controller.rb
+++ b/app/controllers/studies_controller.rb
@@ -1,7 +1,8 @@
 class StudiesController < ApplicationController
+	helper_method :sort_column, :sort_direction
 
 	def index
-		@studies = Study.all
+		@studies = Study.order(sort_column + " " + sort_direction)
 	end
 
 	def show
@@ -35,4 +36,12 @@ def study_params
 		params.require(:study).permit(:title, :principal_investigator, :open)
 	end
 
+	def sort_column
+    Study.column_names.include?(params[:sort]) ? params[:sort] : "title"
+  end
+  
+  def sort_direction
+    %w[asc desc].include?(params[:direction]) ? params[:direction] : "asc"
+  end
+
 end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index de6be79..340215b 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1,2 +1,9 @@
 module ApplicationHelper
+
+	def sort_by_column(column, title = nil)
+	  title ||= column.titleize
+	  direction = column == sort_column && sort_direction == "asc" ? "desc" : "asc"
+	  link_to title, {:sort => column, :direction => direction}
+	end
+
 end
diff --git a/app/views/studies/index.html.erb b/app/views/studies/index.html.erb
index c02be99..6bf65d2 100644
--- a/app/views/studies/index.html.erb
+++ b/app/views/studies/index.html.erb
@@ -3,10 +3,10 @@
   <table id="study_table">
     <thead>
     <tr>
-      <th>Study Number</th>
-      <th>Title</th>    
-      <th>Principal Investigator</th>
-      <th>Status</th>
+      <th><%= sort_by_column "id", "Study Number" %></th>
+      <th><%= sort_by_column "title" %></th>    
+      <th><%= sort_by_column "principal_investigator", "Principal Investigator" %></th>
+      <th><%= sort_by_column "open", "Status"%></th>
       <th></th>
     </tr>
     </thead>