Coded Messages...

The following message is written in code. Perhaps a secretary who makes many typos could crack it easily.

di,,rt od s;,pdy jrtr
tr,r,nrt yp esrt upit dimdvtrrm

It's been a while since I've made up a coded message but I have done it a few times this year for the 3rd graders, ever sicne a bunch of girls decided they were going to play "spies" at rcess and asked if I'd be their commander. I was like, "Duh. Of course! I LOVE spy shows." So, as Commander Ten, I issue coded messages from time to time, usually related to math but this time, this one is related to their computer typing skills. Can you crack the code?