Look for patterns in student work that follow the "one error in one hundred right moves" (Smith, 2014). To prepare yourself as a teacher, for the items that might be missing/ignored it is essential that your review the possibilities yourself. They are automatic in your own reading/writing but the teacher/tutor must now use their discipline of noticing to inform the learner. You might find the following materials helpful in noticing what patterns to look for:
Phonological Awareness and Phonemes with Peggy Semingson
Reading-Tutors phonics free package materials & samples
Reading-Tutors additional free materials & samples
Root Words downloads (Latin and Greek roots)
Free Phonological Materials in a Guide
Freddie Hiebert talks about Vocabulary and the Digital Global Age (YouTube)
For Young Ones - Teach Your Monster to Read
ASCD Recommended Vocabulary Sites...
Example ... Jazz Band vocabulary search from vocabulary.com
Flocabulary.com - songs, vidoes, to support K-12 vocabulary building.
Vocabahead.com - word lists, games and other assorted activities.
Lexipedia - online visual word site.
Wordnik - definitions, tables, alternatives takes on words.
Lingro - learn vocabulary and language quickly
Snappy Words - Interactive dictionary and thesaurus. Associated words lists.