diff --git a/app/controllers/attempts_controller.rb b/app/controllers/attempts_controller.rb
index 0d683cb4..0dff96bb 100644
--- a/app/controllers/attempts_controller.rb
+++ b/app/controllers/attempts_controller.rb
@@ -6,19 +6,27 @@ class AttemptsController < ApplicationController
     recipient = Recipient.where(phone: twilio_params['From']).first
     attempt = recipient.attempts.last_sent.first
 
-    if (twilio_params[:Body].downcase == 'stop')
-      attempt.recipient.update_attributes(opted_out: true)
-      attempt.update_attributes(twilio_details: twilio_params.to_h.to_yaml)
-      render plain: 'Thank you, you have been opted out of these messages and will no longer receive them.'
-      return
-    end
+    all_twilio_details = (attempt.twilio_details || '').split('~!~')
+    all_twilio_details << twilio_params.to_h.to_yaml
 
     attempt.save_response(
       answer_index: twilio_params[:Body].to_i > 0 ? twilio_params[:Body].to_i : nil,
-      twilio_details: twilio_params.to_h.to_yaml
+      twilio_details: all_twilio_details.join('~!~')
     )
 
-    if (twilio_params[:Body].downcase == 'skip')
+    unless (['start', 'resume', 'restart', 'yes', 'go'].index(twilio_params[:Body].downcase).nil?)
+      recipient.update_attributes(opted_out: false)
+      render plain: 'Thank you, you will now begin receiving messages again.'
+      return
+    end
+
+    unless (['stop', 'cancel', 'quit', 'no'].index(twilio_params[:Body].downcase).nil?)
+      recipient.update_attributes(opted_out: true)
+      render plain: 'Thank you, you have been opted out of these messages and will no longer receive them.'
+      return
+    end
+
+    unless (['skip', 'i dont know', "i don't know", 'next'].index(twilio_params[:Body].downcase).nil?)
       render plain: 'Thank you, this question has been skipped.'
       return
     end
diff --git a/spec/controllers/attempts_controller_spec.rb b/spec/controllers/attempts_controller_spec.rb
index a6fc6508..54762f7f 100644
--- a/spec/controllers/attempts_controller_spec.rb
+++ b/spec/controllers/attempts_controller_spec.rb
@@ -105,47 +105,77 @@ RSpec.describe AttemptsController, type: :controller do
       end
     end
 
-    context 'with stop params' do
-      let(:twilio_attributes) {
-        {'MessageSid' => 'ewuefhwieuhfweiuhfewiuhf','AccountSid' => 'wefiuwhefuwehfuwefinwefw','MessagingServiceSid' => 'efwneufhwuefhweiufhiuewhf','From' => '+0000000000','To' => '2223334444','Body' => 'sToP','NumMedia' => '0'}
-      }
+    ['stOp', 'cANcel', 'QuIt', 'no'].each do |command|
+      context "with #{command} command" do
+        let(:twilio_attributes) {
+          {'MessageSid' => 'ewuefhwieuhfweiuhfewiuhf','AccountSid' => 'wefiuwhefuwehfuwefinwefw','MessagingServiceSid' => 'efwneufhwuefhweiufhiuewhf','From' => '+0000000000','To' => '2223334444','Body' => command,'NumMedia' => '0'}
+        }
 
-      it "updates the last attempt by recipient phone number" do
-        post :twilio, params: twilio_attributes
-        attempt.reload
-        expect(attempt.answer_index).to be_nil
-        expect(attempt.twilio_details).to eq(twilio_attributes.with_indifferent_access.to_yaml)
-        expect(attempt.recipient).to be_opted_out
-      end
+        it "updates the last attempt by recipient phone number" do
+          post :twilio, params: twilio_attributes
+          attempt.reload
+          expect(attempt.answer_index).to be_nil
+          expect(attempt.twilio_details).to eq(twilio_attributes.with_indifferent_access.to_yaml)
+          expect(attempt.recipient).to be_opted_out
+        end
 
-      it "sends back a message" do
-        post :twilio, params: twilio_attributes
-        expect(response.body).to eq('Thank you, you have been opted out of these messages and will no longer receive them.')
+        it "sends back a message" do
+          post :twilio, params: twilio_attributes
+          expect(response.body).to eq('Thank you, you have been opted out of these messages and will no longer receive them.')
+        end
       end
     end
 
-    context 'with skip params' do
-      let(:twilio_skip_attributes) {
-        {'MessageSid' => 'ewuefhwieuhfweiuhfewiuhf','AccountSid' => 'wefiuwhefuwehfuwefinwefw','MessagingServiceSid' => 'efwneufhwuefhweiufhiuewhf','From' => '+0000000000','To' => '2223334444','Body' => 'SkIP','NumMedia' => '0'}
-      }
+    ['staRt', 'reSUme', 'rEstaRt', 'Yes', 'go'].each do |command|
+      context "with #{command} command" do
+        before :each do
+          attempt.recipient.update(opted_out: true)
+        end
 
-      it "updates the last attempt by recipient phone number" do
-        post :twilio, params: twilio_skip_attributes
-        attempt.reload
-        expect(attempt.answer_index).to be_nil
-        expect(attempt.responded_at).to be_present
-        expect(attempt.twilio_details).to eq(twilio_skip_attributes.with_indifferent_access.to_yaml)
-        expect(attempt.recipient).to_not be_opted_out
+        let(:twilio_attributes) {
+          {'MessageSid' => 'ewuefhwieuhfweiuhfewiuhf','AccountSid' => 'wefiuwhefuwehfuwefinwefw','MessagingServiceSid' => 'efwneufhwuefhweiufhiuewhf','From' => '+0000000000','To' => '2223334444','Body' => command,'NumMedia' => '0'}
+        }
 
-        school_attempts = attempt.question.attempts.for_school(school)
-        expect(school_attempts.with_answer.count).to eq(0)
-        expect(school_attempts.with_no_answer.count).to eq(3)
-        expect(school_attempts.not_yet_responded.count).to eq(2)
+        it "updates the last attempt by recipient phone number" do
+          expect(attempt.recipient).to be_opted_out
+          post :twilio, params: twilio_attributes
+          attempt.reload
+          expect(attempt.answer_index).to be_nil
+          expect(attempt.twilio_details).to eq(twilio_attributes.with_indifferent_access.to_yaml)
+          expect(attempt.recipient).to_not be_opted_out
+        end
+
+        it "sends back a message" do
+          post :twilio, params: twilio_attributes
+          expect(response.body).to eq('Thank you, you will now begin receiving messages again.')
+        end
       end
+    end
 
-      it "sends back a message" do
-        post :twilio, params: twilio_skip_attributes
-        expect(response.body).to eq('Thank you, this question has been skipped.')
+    ['skip', 'i dont know', "i don't know", 'next'].each do |command|
+      context "with #{command} command" do
+        let(:twilio_skip_attributes) {
+          {'MessageSid' => 'ewuefhwieuhfweiuhfewiuhf','AccountSid' => 'wefiuwhefuwehfuwefinwefw','MessagingServiceSid' => 'efwneufhwuefhweiufhiuewhf','From' => '+0000000000','To' => '2223334444','Body' => command,'NumMedia' => '0'}
+        }
+
+        it "updates the last attempt by recipient phone number" do
+          post :twilio, params: twilio_skip_attributes
+          attempt.reload
+          expect(attempt.answer_index).to be_nil
+          expect(attempt.responded_at).to be_present
+          expect(attempt.twilio_details).to eq(twilio_skip_attributes.with_indifferent_access.to_yaml)
+          expect(attempt.recipient).to_not be_opted_out
+
+          school_attempts = attempt.question.attempts.for_school(school)
+          expect(school_attempts.with_answer.count).to eq(0)
+          expect(school_attempts.with_no_answer.count).to eq(3)
+          expect(school_attempts.not_yet_responded.count).to eq(2)
+        end
+
+        it "sends back a message" do
+          post :twilio, params: twilio_skip_attributes
+          expect(response.body).to eq('Thank you, this question has been skipped.')
+        end
       end
     end
   end