Class	Machine/Setting	Time Span	Gain
Suburban-Regular 2nd Grade -85% two working parents	One machine - lowest achieving quadrant of class	Four months - four times daily	Two years to five years growth
Inner City ESL, Chinese 3rd and 4th grade	Lab setting with 30 machines	Four months - once to twice weekly	Almost 1 1/2 years mean growth
Inner City ESL, Chinese 3rd Graders	Lab setting with 30 machines	Four months - once to twice weekly	Mean growth 1.44 years in 4 months
Inner City ESL, Spanish 3rd Graders	Lab setting with 30 machines	Four months - once to twice weekly	Mean growth 1.30 years in 4 months
Hollywood - ESL Armenian, 3rd graders	Two machines - lowest quadrant of class	3 months- twice weekly	Mean growth 1 year in 3 months
Juvenile Justice Teens - Chapter I	Two machines -lowest quadrant of class	3 months - twice weekly	Mean growth 1 year