The person is usually reading below grade level 
Could reverse letter sequences - soiled for solid, left for felt 
Could reverse word sequences
Could invert letters
Could be slow at learn prefixes, suffixes, and root words.
Could have difficulty spelling - spells same word differently on the same page 
May avoid reading aloud
Could have trouble with word problems
Could write with difficulty with illegible handwriting; pencil grip is awkward, fist-like or tight 
Could avoid writing
Could have slow or poor recall of facts
Could have difficulty with comprehension
Could have difficulty making friends
May not understand body language and facial expressions of others
Could have trouble with non-literal language (idioms, jokes, proverbs, slang)
Could forget to hand in homework or to bring in homework
Could have difficulty with planning and time management
Mathematics and musical notation can also be affected.