In our household, at least.
“The Journal”–on the breakfast table and there to peruse all day long.
The Berlin Philharmonic– archived and live concerts, in HD picture and sound, through digitalconcerthall.com. Special subscription rate available for teachers and students.
Khan Academy — brilliant and, for our purposes, sufficient drills for all basic mathematics (i.e., up to and including calculus).
A good home library. If possible, one should dedicate a room of one’s house to the library, not simply for a place for study, but also to exhibit the importance of the life of the mind.
Kindles all round — every child has one, and we assign books from the 1000 Good Books List of the CCESL
Chrome books all round. At $250 a pop, easy to justify relative to tuition.