Curses are the Worst — Elizabeth Eulberg

Goosebumps meets The Baily School Kids in this young middle-grade series about four unlikely friends who must band together to save their town from an evil curse!
WARNING: This book contains a very scary and silly story about a long-dormant witch's curse that's been unleashed on the unsuspecting town of Cauldron's Cove. It's revenge, over three hundred years in the making. (Hey, better late than never!)

When Regan, Sofia, Bennett, and Darius unfairly get put into detention, they know something is wrong. And they're right: This detention is far from ordinary. Their science teacher, Ms. Stein, believes that by using these kids' DNA she can create an army of “perfect” students who have Sofia's smarts, Regan's heart, Bennett's likeability, and Darius's loyalty. Soon the clones are wreaking havoc around town and getting the real kids in trouble!

Will the kids be able to save the town or will they be cursed for eternity? There's only one way to find out and fair warning, dear reader, you should definitely read this with the lights on.