I lost my calculator, a TI-83+. I took a test on matrices on 4th period, and bring the calculator back to the library, and then I did some study there. In 7th period, when I tries to use the calculator again, it's gone.
The best explanation is I lost my calculator at the library. Because that's the last time I used the calculator.
I inscribed my name on the calculator, so I guess if someone find it will know I lost it.
The next day, I go back to the library, and ask the librarian if there is any calculators around. They said "nope".
Guess someone else found it and took it.
kuzew told me, last time he lost the calculator in school, it's gone forever.
This is not the first time I lost something in school, and last time, it was 2 flash drives, and it's gone, one of them I just brought the day before it's lost.
The worst part was I just put new fresh batteries in the calculator!!! If I know that's going to happen, I would not get new batteries and put it in there!

I always believed, if someone found something someone else lost, they will try to give this thing back. But no... at least, not in our school.
The good part is, I just brought a new calculator, a TI-89, features a CAS. I didn't by the TI-89 Titanium version, I'm in Amazon prime so take off the cost of shipping, it will cost like the same amount of money. But, I like TI-89 better, because I can make it look like TI-83+ with a case change hack. Since TI-83+ is the most popular one around the US, it's will not draw as much attention as TI-84(the only possible hack for TI-89 Titanium) and eventual exposing I'm using TI-89, which is not allowed for some tests, like the ACT.
Can't wait to get it shipped to my hands... and pay my credit card bill.