Using this stack chair is a breeze. Just place it wherever you need seating in the classroom. It's designed for kids in 3rd to 7th grade, so make sure it's used by the appropriate age group. When stacking, you can stack up to 15 chairs together, but be careful not to stack them too high to avoid them toppling over. For maintenance, thanks to the dry - assisting drain holes, you can easily clean the chair. Wipe it down with a damp cloth regularly. The non - marring plastic floor glides protect your floors, so there's no need to worry about scratches. The frame has a limited lifetime warranty, but try to avoid rough handling to keep it in good condition for a long time.