My sister is always forgetful she always forgets things. She works really hard on studies but the result are unsatisfactory. She works like a 90% and hardly manages to pass. She is very slow in all her work. Too much behind then her classmates. What can be done to improve her memory and speed? And also she has got lice. Is that causing it. Note: She is not completely​ dull. She is always on gossips. She remembers serial episodes and songs. She takes part in activities. But memory and speed in studies is a concern...