If you want better results while studying, revision is the key. Repeated revision consolidates the information in the brain and helps to retain the information. Other than that, try a daily exercise of recalling your entire day in as much detail as possible before you sleep. Initially only important or superficial details are recalled, but with practice minor details can also be recalled. Be more organized; make lists. Use acronyms and mnemonic devices to help you remember. Take 45 minute slots followed by a 5-15 minute break. Eat and at proper times. Drink plenty of water. Find time for exercise or meditation. Keep time for proper revision at end of study session. Revise before you sleep. Loss of interest, decreased concentration and attention, feeling low and disturbed sleep or appetite are some of the signs of depression. Consult a psychiatrist who will assess her in detail. If she is feeling suicidal or hopeless, seek professional help immediately. Try some relaxation techniques like yoga, meditation and deep breathing. Indulge in hobbies. Let her spend time with people close to her.

Hello there.  I can understand your concern.  All this is normal during exams. Losing concentration is normal. Just keep all the distractions aside. Switch off the mobile and ither electronics and start studying. You do not have any other option. Cap. Revital-H once a day after food for 10 days. Cap. Brain-DHA once a day after food for 10 days. Best regards. Dr. Anil kumar jain. Bangalore.