diff --git a/app/services/admin_data_loader.rb b/app/services/admin_data_loader.rb
new file mode 100644
index 00000000..aba0ad06
--- /dev/null
+++ b/app/services/admin_data_loader.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+require 'csv'
+
+class AdminDataLoader
+  def self.load_data(filepath:)
+    admin_data_values = []
+    CSV.parse(File.read(filepath), headers: true) do |row|
+      score = likert_score(row:)
+      unless valid_likert_score(likert_score: score)
+        puts "Invalid score: #{score}
+        for school: #{School.find_by_dese_id(row['DESE ID']).name}
+        admin data item #{admin_data_item(row:)} "
+        next
+      end
+      admin_data_values << create_admin_data_value(row:, score:)
+    end
+
+    AdminDataValue.import(admin_data_values.flatten.compact, on_duplicate_key_update: :all)
+  end
+
+  private
+
+  def self.valid_likert_score(likert_score:)
+    likert_score >= 1 && likert_score <= 5
+  end
+
+  def self.likert_score(row:)
+    likert_score = (row['LikertScore'] || row['Likert Score'] || row['Likert_Score']).to_f
+    likert_score = round_up_to_one(likert_score:)
+    round_down_to_five(likert_score:)
+  end
+
+  def self.round_up_to_one(likert_score:)
+    likert_score = 1 if likert_score.positive? && likert_score < 1
+    likert_score
+  end
+
+  def self.round_down_to_five(likert_score:)
+    likert_score = 5 if likert_score > 5
+    likert_score
+  end
+
+  def self.ay(row:)
+    row['Academic Year'] || row['AcademicYear']
+  end
+
+  def self.dese_id(row:)
+    row['DESE ID'] || row['Dese ID'] || row['Dese Id']
+  end
+
+  def self.admin_data_item(row:)
+    row['Item ID'] || row['Item Id']
+  end
+
+  def self.create_admin_data_value(row:, score:)
+    admin_data_value = AdminDataValue.find_or_initialize_by(school: School.find_by_dese_id(dese_id(row:).to_i),
+                                                            academic_year: AcademicYear.find_by_range(ay(row:)),
+                                                            admin_data_item: AdminDataItem.find_by_admin_data_item_id(admin_data_item(row:)))
+    return nil if admin_data_value.likert_score == score
+
+    admin_data_value.likert_score = score
+    admin_data_value
+  end
+
+  private_class_method :valid_likert_score
+  private_class_method :likert_score
+  private_class_method :round_up_to_one
+  private_class_method :ay
+  private_class_method :dese_id
+  private_class_method :admin_data_item
+  private_class_method :create_admin_data_value
+end
diff --git a/lib/tasks/data.rake b/lib/tasks/data.rake
index 6f43a016..b14d82c3 100644
--- a/lib/tasks/data.rake
+++ b/lib/tasks/data.rake
@@ -152,12 +152,12 @@ namespace :data do
 
   desc 'load admin_data'
   task load_admin_data: :environment do
-    AdminDataValue.delete_all
+    original_count = AdminDataValue.count
     Dir.glob(Rails.root.join('data', 'admin_data', 'dese', '*.csv')).each do |filepath|
       puts "=====================> Loading data from csv at path: #{filepath}"
       Dese::Loader.load_data filepath:
     end
-    puts "=====================> Completed loading #{AdminDataValue.count} survey responses"
+    puts "=====================> Completed loading #{AdminDataValue.count - original_count} admin data values"
   end
 
   desc 'load students'
diff --git a/spec/fixtures/secondary_sample_admin_data.csv b/spec/fixtures/secondary_sample_admin_data.csv
new file mode 100644
index 00000000..8cdc3c2d
--- /dev/null
+++ b/spec/fixtures/secondary_sample_admin_data.csv
@@ -0,0 +1,13 @@
+District,School,DESE ID,Category,Item ID,NonLikert Title,NL_Value,LikertScore,Benchmark,Data Type,Academic Year
+Attleboro,Attleboro High School,160505,2-C-i,a-vale-i1,Chronic absence rate,19.7,1,10,%,2018-19
+Milford,Woodland Elementary School,1850090,2-C-i,a-vale-i1,Chronic absence rate,6.8,1,10,%,2018-19
+Revere,Beachmont Elementary School,2480013,2-C-i,a-vale-i1,Chronic absence rate,4.2,1,10,%,2018-19
+Winchester,Winchester High School,3440505,2-C-i,a-vale-i1,Chronic absence rate,7.2,1,10,%,2018-19
+Attleboro,Attleboro High School,160505,3-A-i,a-reso-i1,Average class size,20.6,2,20,,2018-19
+Milford,Woodland Elementary School,1850090,3-A-i,a-reso-i1,Average class size,22.5,2,20,,2018-19
+Revere,Beachmont Elementary School,2480013,3-A-i,a-reso-i1,Average class size,17,2,20,,2018-19
+Winchester,Winchester High School,3440505,3-A-i,a-reso-i1,Average class size,17,2,20,,2018-19
+Attleboro,Attleboro High School,160505,3-A-ii,a-sust-i3,Student to instructional support staff ratio,15.28896673,3,43.4,,2018-19
+Milford,Woodland Elementary School,1850090,3-A-ii,a-sust-i3,Student to instructional support staff ratio,22.85714286,3,43.4,,2018-19
+Revere,Beachmont Elementary School,2480013,3-A-ii,a-sust-i3,Student to instructional support staff ratio,38,3,43.4,,2018-19
+Winchester,Winchester High School,3440505,3-A-ii,a-sust-i3,Student to instructional support staff ratio,135.9,3,43.4,,2018-19
diff --git a/spec/services/admin_data_loader_spec.rb b/spec/services/admin_data_loader_spec.rb
new file mode 100644
index 00000000..7361da96
--- /dev/null
+++ b/spec/services/admin_data_loader_spec.rb
@@ -0,0 +1,102 @@
+require 'rails_helper'
+
+describe AdminDataLoader do
+  let(:path_to_admin_data) { Rails.root.join('spec', 'fixtures', 'sample_admin_data.csv') }
+  let(:path_to_secondary_admin_data) { Rails.root.join('spec', 'fixtures', 'secondary_sample_admin_data.csv') }
+  let(:ay_2018_19) { create(:academic_year, range: '2018-19') }
+  let(:attleboro) { create(:school, name: 'Attleboro High School', dese_id: 160_505) }
+  let(:winchester) { create(:school, name: 'Winchester High School', dese_id: 3_440_505) }
+  let(:beachmont) { create(:school, dese_id: 2_480_013) }
+  let(:woodland) { create(:school, dese_id: 1_850_090) } # not explicitly tested
+  let(:chronic_absense_rate) { create(:admin_data_item, admin_data_item_id: 'a-vale-i1') }
+  let(:student_to_instructor_ratio) { create(:admin_data_item, admin_data_item_id: 'a-sust-i3') }
+  let(:a_reso) { create(:admin_data_item, admin_data_item_id: 'a-reso-i1') } # not explicitly tested
+
+  before :each do
+    ay_2018_19
+    attleboro
+    winchester
+    beachmont
+    woodland
+    chronic_absense_rate
+    student_to_instructor_ratio
+    a_reso
+    AdminDataLoader.load_data filepath: path_to_admin_data
+  end
+
+  after :each do
+    DatabaseCleaner.clean
+  end
+
+  describe 'self.load_data' do
+    it 'loads the correct admin data values' do
+      # it 'assigns the academic year to admin data value' do
+      expect(AdminDataValue.where(school: attleboro,
+                                  admin_data_item: chronic_absense_rate).first.academic_year).to eq ay_2018_19
+      # end
+
+      # it 'assigns the school to the admin data value' do
+      expect(AdminDataValue.first.school).to eq attleboro
+      expect(AdminDataValue.last.school).to eq winchester
+      # end
+
+      # it 'links the admin data value to the correct admin data item' do
+      expect(AdminDataValue.first.admin_data_item).to eq chronic_absense_rate
+      expect(AdminDataValue.last.admin_data_item).to eq student_to_instructor_ratio
+      # end
+
+      # it 'loads all the admin data values in the target csv file' do
+      expect(AdminDataValue.count).to eq 11
+      # end
+
+      # it 'captures the likert score ' do
+      expect(AdminDataValue.find_by(school: attleboro, academic_year: ay_2018_19,
+                                    admin_data_item: chronic_absense_rate).likert_score).to eq 3.03
+      expect(AdminDataValue.find_by(school: beachmont, academic_year: ay_2018_19,
+                                    admin_data_item: student_to_instructor_ratio).likert_score).to eq 3.5
+      expect(AdminDataValue.find_by(school: winchester, academic_year: ay_2018_19,
+                                    admin_data_item: student_to_instructor_ratio).likert_score).to eq 5
+      # end
+
+      # it 'rounds up any likert_scores between 0 and 1 (non-inclusive) to 1' do
+      expect(AdminDataValue.where(school: attleboro, academic_year: ay_2018_19,
+                                  admin_data_item: AdminDataItem.find_by_admin_data_item_id('a-sust-i3')).first.likert_score).to eq 1
+      # end
+      # it 'rejects importing rows with a value of 0' do
+      expect(AdminDataValue.where(school: attleboro, academic_year: ay_2018_19,
+                                  admin_data_item: AdminDataItem.find_by_admin_data_item_id('a-reso-i1'))).not_to exist
+      # end
+    end
+
+    context 'when a second file exists' do
+      before :each do
+        AdminDataLoader.load_data filepath: path_to_secondary_admin_data
+      end
+
+      it 'updates likert scores to match the new file' do
+        expect(AdminDataValue.find_by(school: attleboro, academic_year: ay_2018_19,
+                                      admin_data_item: chronic_absense_rate).likert_score).to eq 1
+        expect(AdminDataValue.find_by(school: beachmont, academic_year: ay_2018_19,
+                                      admin_data_item: student_to_instructor_ratio).likert_score).to eq 3
+      end
+    end
+  end
+
+  describe 'output to console' do
+    it 'outputs a messsage saying a value has been rejected' do
+      output = capture_stdout { AdminDataLoader.load_data filepath: path_to_admin_data }.delete("\n")
+      expect(output).to eq 'Invalid score: 0.0        for school: Attleboro High School        admin data item a-reso-i1 '
+    end
+  end
+end
+
+def capture_stdout
+  original_stdout = $stdout
+  $stdout = fake = StringIO.new
+  begin
+    yield
+  ensure
+    $stdout = original_stdout
+  end
+  fake.string
+end