That was one of the first sounds we worked on actually. That didn't have any relation to the tounge tie though. We did a lot of 'homework' with her at home with memory games, colouring in with the sheets that her speechie gave her and just a hell of a lot of repetition. Like we would get her to say 'monkey-key. donkey-key, mickey-key' etc to help her get the K sound. And with the C sound it was 'c-at' - splitting the c from the at and then gradually getting her to say it closer together. Some of her speech issues might be separate from any caused by tounge tie if she does have one.