How Do I Find Information On Home Schooling For A High School Student That Isn’t Gonna Break The Bank?

My sister-in-law is having trouble with her 16 yr. old daughter and the school she is attending. She wants to finish her schooling from home but does not have alot of money to spend on curriculm and supplies. She is a single mom and just wants to help her daughter to finish school without the interference from the cruelty of her peers at the school.