h4 What happend?
h5 Please let us know why the session was not completed.

.pl20
  = simple_form_for tutoring_session, url: mark_unoccured_tutoring_session_path(tutoring_session), validate: true, turboboost: true, html: {id: 'mark-unoccured'} do |f|
    = f.fields_for :session_omitted_reason do |s|
      = s.input :reason, as: :radio_buttons, validate: true,
        collection: SessionOmittedReason::REASONS.map.with_index.to_a,
        label: false, checked: s.object.reason || 0
      = s.input :other_reason, label: false, disabled: s.object.reason != 3, validate: {presence: true}

    .center-block.text-center.pt15
      = f.button :submit, 'Submit', class: 'btn btn-default'