13-year old boy wrote a story and here it is:

"My smmr hols wr CWOT. B4, we used 2go2 NY 2C my bro, his GF & thr 3 : kids FTF. ILNY, it's a gr8 plc."

Translation:
"My summer holidays were a complete waste of time. Before, we used to go to New York to see my brother, his girlfriend, and their three screaming kids face to face. I love New York. It's a great place."

Another student even won a prize for an 160-symbols essay:
"dad@hvn, ur spshl. we want wot u want &urth2b like hvn. giv us food & 4giv r sins lyk we 4giv uvaz. don't test us! save us! bcos we kno ur boss, ur tuf & ur cool 4 eva! ok?"