Combine the mayonnaise, Parmesan cheese, and garlic powder in a bowl. Place bread crumbs in a shallow dipping container.
Spread mayonnaise mixture on each tenderloin, then dip each tenderloin into the bread crumbs to coat both sides.
Place coated chicken on a silicone baking sheet or a metal baking sheet lined with aluminum foil.
Bake 20 minutes in the preheated oven, or until chicken juices run clear and coating is golden brown.
Spreading the mayonnaise mixture with a spoon or small spatula is less of a mess, but you may find dipping the tenders by hand to be easier. If you don’t want to get your hands messy, wear disposable gloves or get the kids involved—most kids enjoy helping and don’t seem to mind the mess.