Well, I'm really, really sorry to everyone who has spent time trying to tackle this puzzle. I made a HUGE mistake in the presentation. I honestly don't know how I managed to make a mistake this big, but in any case, I'm sorry to have wasted your time. What's worse is that I didn't even realize the mistake I had made and I posted comments encouraging people and telling them that they were on the right track.
The rubik's cube image is wrong. I don't really have an excuse, but this is what happened: during the development of this puzzle, I toyed with several different ways to incorporate the rubik's cube. One of the versions of the puzzle involved the rubik's cube image that I ended up using, but it isn't the one that matches the cipher text that I provided.
The correct image should feature a solved rubik's cube net numbered in the following fashion.
[ 1][ 2] [ 3][ 4] [ 5][ 6] [ 7][ 8] [ 9]       
and the exact same unsolved rubik's cube, with no letters on it, and every square marked with it's appropriate number.
Again, I'm really, really sorry to have wasted people's time. This isn't quite the impression I had intended to make for my debut question on the site. I'm going to flag this question for closure as "off-topic," but I'm not sure that that is the correct course of action.
The intended solution is:
permute each block of the cipher text the same way that the cube squares are permuted
Use the substitution defined by mapping the "in order" alphabet above the board to the first line of the cipher text.
My girlfriend teaches the third grade at a nearby elementary school. Today, I was supposed to meet her in her classroom after the school day ended, so we could go to the movies together.
However, when I got to her classroom, I couldn't find her. Instead,this message was printed on the white board:
vmrdtonhilxwagfsecjkbupq oowaoijhbhjxcdbrrccbsjdo jwoiyaljrtjccmpgdtpxalcr
On her desk, there was a 2x2x2 rubik's cube with some writing on it. I'm not sure if it is important, but I've reproduced the net of the cube as I found it, as well as the net of the solved state.
It appears that she had written the lettering on herself.
A final detail in the room struck me as out of place. Above the white board, there were cards displaying the cursive alphabet, e.g.
Aa, Bb, Cc..., however it appeared that the final letters
Zz were missing.
All in all, the board looked something like this:
Can you help me decipher the message on the board?
Edit: I modified her cube so that one of two logical orderings is forced. This does not change the answer, but reduces the trial and error to find it.
I also added another image which might be helpful.
Permutation(s) are involved (pretty obvious because of the rubik's cube.), but just permutations will not solve this.
The first line of cipher text is not actually part of the message! It is there to help you decipher the following two lines.