dirty commit: can't get references to work correctly between any tables

app/presenters/dashboard/analyze/graph/students_and_teachers.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module Analyze
+  module Graph
+    class StudentsAndTeachers
+      include Analyze::Graph::Column
+      def to_s
+        'Students & Teachers'
+      end
+
+      def slug
+        'students-and-teachers'
+      end
+
+      def columns
+        [AllStudent, AllTeacher, AllSurveyData]
+      end
+    end
+  end
+end