hah, sounds like your teacher doesnt know how to use the "test mode" features of the MathPrint OSs.
well, for starters, navigating to TI's site(http://waa.ai/pfr)
has the common preinstalled apps and software. however, these arent the only apps out there.
TiCalc.org is a flagship site that houses thousands of programs. the archives area you would want to look at would be "http://waa.ai/pf5
". these programs are often more functional than TI's own, though the community is game-oriented.
Cemetech.net also has its own small archives that is worth looking into, but most of the programs there are also on TiCalc.org.