A/n: I know I've taken too long to post this, but I had writer's block, and I was also writing a story for a contest. I might put that one up too, I don't know. Thanks for all your reviews.

Natalie- Of course, he would say that, wouldn't he? Hope you like this chapter, hehe.

Emilia-We'll see.ideas already forming in my mind.

Gigaku- Thanks. I know. I'll have to work one that!

Julia Lin- Yeah, we had him. It was the day right after I wrote the first two chapters! Scary, huh?

Nytd- Thanks to you too. And I love how AHN is coming along. Snape rules!

So here's the anticipated.



Geometry**************



Jessica stopped by her locker to pick up her math book, then headed to class. She walked in and put her books down. Their substitute hadn't arrived yet.

Five minutes later, she did.

"I'm Ms. Hill. While Ms. Debalso is out, we'll be reviewing the units you have already covered. Now, I need you to get into groups of four. You will each get a separate sheet with."

As she continued explaining what they would be doing, Jessica looked around the room. She couldn't find anything that might hint at Ms. Hill being a professor from Hogwarts. She seemed pretty normal.

When it was time to group up, Jessica went and sat down at a table with Natalie, Ben, and Justin.

"So, who's she?" Ben asked as Jessica sat down.

"I have no idea." They set to work.



When it came time to leave, Ms. Hill told them to have one person from each group bring up the papers. "Here," Justin said, handing Ben his paper.

"No! You take them." Ben passed his and Justin's papers to Natalie. Eventually all four papers ended up on Jessica's desk. Ben and Justin were grinning at her, while Natalie just rolled her eyes. Jessica sighed and took the papers up while the others left.

She walked up to the desk and placed the papers on the pile. It was a book that caught her eye. Jessica carefully looked over so the teacher wouldn't notice. The cover read Numerology and Grammatica. She had seen that name before. Right! In the Harry Potter books, Hermione used it in Arithmacy.Arithmacy! That meant the substitute was.

"Professor Vector." Jessica slapped her hand over her mouth too late. Ms. Hill snapped her head up from her work. As quickly as she could, Jessica went over to her table, grabbed her binder, and all but ran out of the classroom.



"Natalie! Ben! Wait up!" They turned around just in time to avoid getting run over by Jessica. "I figured out who she is."

"Who?" Ben asked eagerly.

Jessica looked around to make sure no one was listening. Then she whispered, "Professor Vector!"

"Who?" Natalie asked.

Jessica sighed. "She's the Arithmacy teacher at Hogwarts," she whispered.

Natalie asked again, "What's Arithmacy?" Again, Jessica sighed.

"Jessica, you probably the only person in this school who knows what Arithmacy is. And stop whispering." Ben said as they walked outside to the portables once again for Latin. "No one's going to know what we're talking about."

Jessica added, "Not to mention the fact that everyone else is oblivious to the fact that all our substitutes have British accents!"



A/n: There you go. I hope I can get to chapter 9 soon. Meanwhile, I recommend you go read A Witch, A Wolf, and a Serpent, by Nytd. It's Remus/OC and Snape/OC. It's really good, and there's now a sequel, A Hogwarts Nytdmare. But read WW&S first or you'll be lost.