Student Poem

I received the following just prior to Winter Break:

Oh, geez, what can I say? Ms. Pitman you rock.
I now know the definition of "objective" and "mock."
Reading those books was really fun,
And now I'm so sad that we are done.
I will remember the things we learned in class 503,
And I will always keep them close to me.
Learning Hamlet was a really hard thing to do,
But somehow some way, we all pulled through.
I love the peace and serenity you created in our class,
And of course, adding a bit of sass.
We couldn't have done anything without you,
Like knowing an onomatopoeia is like saying "moo."
Over break I'll try not to forget,
The things you have taught me since we met.

So I am thinking that this poem is feedback of sorts (and this student is not in my homeroom - I have her for Drama and Language Arts). It indicates that repetition is important. That she is "getting" a sense of "peace and serenity" from our ritual of ringing the mindfulness bell at the beginning of Language Arts class and/or from our breath work and self-check in at the beginning of Drama.

Is this measurable evidence? Does it bear any scientific merit? Is emotional feedback an appropriate way to gage how well ritual plays a role in deeper learning and connection?