focus of interest may be on the performance of entire classrooms, so it would make sense to cross-validate at the class or school level on classroom performance.</p>
</section>
<section id="cross-validation-with-spatio-temporal-data" class="level3 unnumbered">
<h3 class="unnumbered anchored" data-anchor-id="cross-validation-with-spatio-temporal-data">Cross-validation with spatio-temporal data</h3>
<p>Often data measurements have spatial or temporal properties. For example, home energy consumption varies by 