Seven forty-five am, and the halls of Walkerville High School were alive with activity. It was the first day of senior year for Arnold Perlstein, who hauled his backpack into his new classroom and sat down in the back row. He hated the first day of school. It was terrifying. There was no telling who his new classmates would be, and it took almost all year for him to readjust to the new group of people. Besides, this year was even more stressful than usual because the teacher that was supposed to have this classroom had resigned at the last minute. Arnold had no idea who the new teacher would be.

The door swung open, and Arnold tensed. But it wasn't the new teacher. It was Phoebe Terese, a shy brunette that he had had in class once before, back in elementary school. She saw him and smiled. "Arnold?"

Arnold nodded in affirmation and waved awkwardly. "Hi, Phoebe."

Phoebe sat down next to him. "I'm glad you're here," she commented. "I hate not knowing anybody on the first day of school."

"I definitely know how that is," Arnold agreed, pushing his glasses up along his nose. "By the way, do you know who our new teacher is supposed to be?"

Before Phoebe could answer, the classroom door opened again and they both looked up. But it wasn't the new teacher. It was Dorothy Ann, sporting her signature pink bookbag. "Hi guys," she said, dropping her books onto a seat in the front row before going to greet Phoebe and Arnold. "I feel like I haven't talked to either of you in forever!"

Two more boys joined the class, a skater in a blue hoodie and his buddy in a red baseball cap turned backwards. D. A. turned around and rushed for them. "Carlos! Ralphie!"

Carlos Ramon gave the blonde a cheeky grin and grabbed her for a hug. She hugged him back, then turned to Ralphie, but he held his hands up and took a step back. "You know I'm not a hugger," he reminded her. Dorothy Ann giggled and gave him his space.

"Hey guys!" called Tim Jamal from the door.

"Is it just me," Ralphie asked, "Or is this literally our whole class all over again?"

Carlos high-fived his old friend. "It's a regular elementary school reunion in here!"

"You can say that again," commented Keisha Franklin, as she and Wanda Li closed the door behind them.

"This is going to be one interesting senior year," said Wanda as she hugged Phoebe hello.

"And there were only eight people on the roster, which means this is all of us," Dorothy Ann said. "It's going to be just like it was in Ms. Frizzle's class."

"Hopefully with normal field trips," Arnold wished quietly.

"Does anybody know who our teacher is supposed to be?" Wanda asked. "The one on the schedule isn't coming back."

"Wait a minute," said Ralphie. "What are the odds of all of us being put in the same senior class?"

D.A. clicked a few buttons on a calculator, then responded, "According to my research, the odds are more than ten thousand to one that we would all be in the same class again."

"Oh, no," Arnold said. "Does that mean what I think it means?"

Before anyone could answer, the empty teacher's desk began to rattle. All of the teenagers looked over at it, watching the desk curiously. It started to shake, then to rock, then suddenly, the middle drawer burst open. A huge ball of light emerged, and when it dimmed, standing on the desk was middle-aged redheaded woman with a hooked nose and a huge grin.

"Good morning class!" she greeted them.

"I knew it," said Tim. "We've been Frizzled again!"