How long are you in here? Or is your girl went to daycare or Kindergardon here before start school? She and even you may just not be used to the system yet. You can buy some books here, like math smart, english smart. They teach wide range in school, not deep though. The addition and subtraction is only small part in the math. You need read to her, or with her lot. What kind of reading level she has? She should read picture book easily, or start to read chapter book. Talk to her teachers in school, and find out weak part of her. Relax, especilly when you talk to her, and be positive to her. She'll gradually got better. Be patient. Good luck.