Answer:
After the Taliban took over Swat Valley:
She had to read at home or attend school in secret locations.
Step-by-step explanation:
The excerpt makes it very clear in the lines below:
After January 2009, she was forced to stay at home and read books, Ellick said. Eventually she was moved around the country where she attended ad-hoc schools.
Malala and the other girls were no longer allowed to attend school. To continue her education, Malala would read books at home and, later, would move around, attending classes in secret. Malala has become an example of courage and perseverance for the whole world after fighting for her rights. She was attacked by the Taliban, being shot. She survived, and has recently graduated from university.