What are speech therapy techniques ,and activities for cochlear implant children

I am sorry that you have such a challenging case as a student! If the child has not progressed after a couple years (which you say in the other question you posted) then my first concern is that the Cochlear Implant is not working effectively. This is most likely due to 2 reasons:

1) the hearing loss may not have been cochlear, but neural, such as an Auditory Neuropathy; or the child may have other Central Auditory Processing issues or neurological factors preventing the sounds from being transmitted properly and/or used effectively on a neurological level. Does she respond to sounds during behavioral testing of the CI equipment or even localize to moderate levels of sound? Does she have other impairments/disorders?

2) the surgery was unsuccessful in terms of the placement of the electrode, or the processor is not working properly. Has the equipment been tested by qualified personnel (preferably the Audiologist at the Implant center or better yet, the manufacturer)?

Because this little girl has not responded well to speech/language therapy and aural habilitation, I believe it is ethically correct to begin teaching alternate language tecniques, such as cued speech or sign language or Oral/Aural Speech techniques, as though she were NOT implanted. Too much critical time of the her neurological language development has passed and no more should be wasted. Of course this requires the consent of the parent(s).

I am highly concerned that the professors at your center have allowed this much time to go by in the life of a child. This case is VERY different than the case I had as a student - he was an older man who had a stroke and he had plateaued in his recovery a couple years before I met him. In your case it is a little girl whose entire future is impacted by how well she develops language/communication skills.