Classroom desks move efficiently in stacks, but only up to the manufacturer's rated height and only with padding on the exposed metal legs that see the most contact during handling.
Pro tip: Recruit extra helpers specifically for the stacking and dolly phase; classroom desk moves go faster and safer with a dedicated stacker and spotter pair rather than one person doing both jobs.
Watch out: Never exceed the manufacturer's stacking height limit; classroom desks are engineered for a specific stack count, and going beyond it risks a topple that can injure whoever is nearby.