Add controller

app/controllers/attendance_tracker_controller.rb

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+class AttendanceTrackerController < ApplicationController
+  def index
+  end
+end

app/helpers/attendance_tracker_helper.rb

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+module AttendanceTrackerHelper
+end

app/views/attendance_tracker/index.html.erb

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+<h1>AttendanceTracker#index</h1>
+<p>Find me in app/views/attendance_tracker/index.html.erb</p>