Who Am I?

I am a tool,
Used by children on a sunny day.
I get used at school,
Making marks however I may.
I am a voice,
Speaking for those who cannot speak.
I have no choice.
Though what I do is bold, I am weak.
I am art,
Creating a message of power.
The images I make can tear you apart.
With me, you'll never be locked in a tower.
I am chalk.
You can walk all over me
& use me as much as you'd like
I'll just wash away when it rains.
My words are more true than an oath,
Because they are taken straight from the heart & soul.
Penetrating the thickest shields,
Jumping the highest fences.
My power cannot be measured in numbers
Nor by words can it be described
I cannot be kept silent, though I make no sound.
For I am the giggles of little children,
& the voice of a teenaged girl,
Singing to herself as she speaks her truth.
Because I am her, & she is me.
No matter where she goes, I am with her.
College will have to get used to the idea.
I am a game, a tool, a voice.
You can use me, I love to be used,
There is nothing I'd like more.
I am chalk, hear me roar.