For memory you can try this spell and it can also improve your concentration. I hope it works and let me know how it went
FOR IMPROVED MEMORY/CONCENTRATION
Begin on a Thursday, perform for nine consecutive days.
Light a yellow candle and concentrate for a moment on its yellow appearance.
Then say the following five times.
"O cheerful yellow, Penetrate my mind Improve my memory
Give me powers of great observation.
May I remember all I seek to recall
May my concentration be Perfect in all things big and small."