app/views/onboarding/school_details/_form.html.erb
<%= simple_form_for(school, url: onboarding_school_details_path(school_onboarding)) do |f| %>
<%= render 'schools/details_form', f: f, key_stages: @key_stages, school: school %>
<%= f.button :submit, school.persisted? ? t('onboarding.school_details.update') : t('onboarding.school_details.create') %>
<% end %>