* sorting corrected on teachers list

admin/app/admin/teachers.rb

@@ -7,6 +7,7 @@ ActiveAdmin.register JamRuby::Teacher, :as => 'Teachers' do
   config.per_page = 100
   config.paginate = true
 
+  scope("Default", default: true) { |scope| scope.unscoped.order("background_check_at > '#{(Date.today - 365).to_s}}' NULLS FIRST, ready_for_session_at IS NULL DESC") }
 
   index do
     column "Name" do |teacher|
@@ -47,7 +48,7 @@ ActiveAdmin.register JamRuby::Teacher, :as => 'Teachers' do
 
         else
           span do
-            'NOT DONE'
+            ''
           end
           span do
             br