I vaguely seem to remember that the Plato Courseware also ran, or they had a
version for, the TI99/4A.
They were pushing it at schools and the like IIRC.
My first real computer was a TI....Still got it here somewhere, complete
with the expansion box and 24k of additional ram, and a 5.25" FDD.
Cheers
Geoff Roberts
Computer Room Internet Cafe
Port Pirie
South Australia.
netcafe(a)pirie.mtx.net.au