A/N: This story is labeled as MSB but is in fact a kind-of-sort-of-but-not-really-unless-you're-into-that-kind-of-thing cross-over with Doctor Who. But I still think someone entirely unfamiliar with Doctor Who would be able to follow this story. This is all just to expand on my growing theory that the Frizz is in fact a Time Lord (or rather a Time Lady) who came to Earth for one specific reason.

If you like this idea and/or this story, I urge you to also check out my other MSB/DW crossovers The Culmination and Conversations which detail what happens to each of Ms. Frizzle's students 20 years after the adventures of the series ends and are intended as the 'sequels' to this story.

Starts with a prologue then goes through each episode in the series in order they aired. Updates should be about once a week.

Frizzy Hair and Field Trips

Prologue: Day 1

"Good morning class! Welcome!" I beamed at the seven bright young faces staring up at me apprehensively. Was it the hair? I rather liked this hair. This body. Not at all like my last one. The last hair I had was far too flat, too boring. This hair was new and exciting. Thrilling. And it was ginger. Ginger was exciting. Promising.

The class still had not moved. "I am Ms. Frizzle." I told them, with a small bow. Frizzle was the name I'd chosen. Valerie Frizzle. It just seemed right. It matched this body perfectly. And I couldn't very well use my real name, now could I?

Everything should be in place. I was ready for this year, the year that would change everything.

"Who's that?" A blonde girl with ponytails (Keesha? No… no Dorothy Anne) asked pointing to my shoulder. I turned my head slightly and smiled.

"This is my trusty assistant and companion, Liz… Liz." I decided. After all, her full name was a little too eccentric. Liz smiled at the students and gave them a friendly wave with one hand, gripping my hair with the other to keep her balance. The blonde girl and a few others waved back, still looking slightly apprehensive.

Lizalria couldn't talk yet, Silurians didn't begin to speak until they were two, but her motor skills were superb for a toddler. She was also surprisingly tolerant of the "apes" her race despised. Probably because she hadn't known any of her people. They all still lay beneath the earth, fast asleep, not to awaken for another thousand years or so. Lizalria had been accidentally woken up upon my last trip to Earth where a landing malfunction had caused me to disturb a frozen hatchery. So Lizalria or, Liz as I would now call her, was my responsibility as well. But she showed no ill-will towards me, me being the closest thing to a mother she was likely to have. Maybe once our time here was up, I'd take her to the future. Or the past. Let her see her proud race upon the Earth again. Leave her with her own kind. But that was too far ahead to think about now. For this year, Liz would be staying with me as my constant companion and the only inhabitant of this planet who would know who I really was.

"What kind of lizard is she?" Asked a boy in a red baseball cap. He was sitting in the front group of desks and peered at Liz with a curious kind of fascination. I already knew his name. He was Ralphie.

"The best kind: a Certified Teaching Lizard." I replied, scooping her up into my arms. Liz gave a silent chuckle at my spontaneous creation of a title for her. She was a clever one. She'd be the perfect assistant this year.

"Uhhh.. excuse me…. Ms. Frizzle?"

I turned to the orange-haired human with his hand in the air. What was his name again? Carlos? No, that was the dark-haired boy… Arnold! That was it.

"Yes Arnold?"

He seemed a little surprised that I knew his name already. Did humans need to be reminded of a name several times? I'd have to remember that.

"Is it true that you take your classes on… on field trips a lot?" He asked apprehensively.

I grinned. This perception filter was working perfectly! Almost too perfectly… what else could it be creating about me? What other stories were there floating around this school to make me seem human?

"What an excellent suggestion Arnold!" Liz jumped out of my arms and ran across the floor towards the door.

Arnold swallowed hard and pulled at the collar of his shirt. "Suggestion…?"

"To the BUS!" I yelled, pointing out the window where my magnificent ship was parked. It had taken on the shape of a four-wheeled Earth vehicle but with some curious, distinctly none-Earth features such as the scopes on the front and the display on the helm. But I trusted that it knew what I needed. It always did.

The students all looked at each other in confusion as I marched to the door and turned on my heel. "Aren't you coming then?" I asked them.

After a moment of stunned silence, the small Asian girl leapt to her feet. "Come on, you weasly wimps!" She cried and dashed to my side. "Let's go!" My left heart jumped as I finally realized which one she was. Wanda Li. I placed a gentle hand on her shoulder and offered her a smile.

"Come along class!"

The dark-haired Mexican boy (Carlos) hesitantly stood and made his way to my side. Ralphie and the quiet African-American boy, Tim, followed. Slowly, the rest of the students stood up and made their way towards me, Arnold timidly bringing up the rear.

I grinned as I held the door open. "Single-file please!"

A few minutes later, we were driving along the road from the school, the BUS being very complacent with the slow speed I was taking. After all, I had no idea where I was going yet. But I trusted my ship to get me there.

"Where are we going, Ms. Frizzle?" Carlos asked me from the seat right behind where I operated the BUS. It was strange, the BUS had shrunk itself down to be only about the size of a standard vehicle. I wonder where all those other rooms went? They'd probably turn up eventually, they always did. It had also given us more than enough seats for myself and my students. Was it anticipating guests?

"Wherever we want." I replied to Carlos. We had quite literally, infinite possibilities. Well, nearly infinite thanks to the restrictions of my exile but close enough. "Where would you like to go?"

"Daredevil Junction?" Wanda asked hopefully.

"The art show?" Tim piped up.

"The space museum?" Dorothy Anne asked, her eyes shining.

"Home?" I heard Arnold mutter.

But my focus was on the African-American girl, Keesha who was looking out of the BUS window at the rolling fields of grasses we were passing.

"I wonder what it's like see the world from down there." She said, more to herself than to anyone else. "I bet it looks really different…"

A smile lit up my face. That's what I was waiting for.

"An excellent postulation, Keesha!" She jumped in surprise as I addressed her. Oh, was I not supposed to hear what she had said? I did have very good hearing. Or was that considered rude too?

I addressed the entire class. "So, does anyone know what it's like to see the world from a blade of grass?"

Silence.

"Well," Said Ralphie. "No. I mean, nobody's able to shrink themselves down to fit on a blade of grass. So, how would we know?"

Liz and I shared a wink. "Well now class, shall we investigate a little closer?" I set the BUS to shrinkerscope size –x15. I always wanted to see what it was like to walk along a blade of grass, even an Earth one. Besides, if this was going to work, I had to make sure my students realized the importance of having a different perspective as early as possible. What better time than the first day?

As I would probably say a lot in the future: there's always time to take chances. And a year could be a long time.

"Seatbelts everyone!" I yelled over my shoulder.

I pulled the lever and we began to spin.

The students screamed in surprise and confusion behind me. I smiled at Liz. She gave me a thumbs-up.

It was going to be a great year.

A.N.: Just a little intro to set the tone and establish some plot points. Hope you enjoyed it!