My son was fisting the pencil prior to K and we took him to an OT that specialized in handwriting. The center was called Scribble to Script. During therapy they first started with a picture of a hand and had him colored the thumb and first two fingers in green and the ring finger and pinky in red. Green were go fingers and red were stop fingers. They had him old a small cotton ball with his stop fingers and practice with tongs with his go fingers. They encouraged us to use tongs whenever possible, like while eating so he could get used to the finger grasp and the stop and go fingers being taught. There is a program that you can purchase, workbooks, called Handwriting without tears that he worked from. They learned the letters not in order but in rather in the order of straight letters, I, L, K, H, F, E, V, N, M, etc. Telling him big line and little line. They then introduced the curved letters starting with C then O and Q. Again, using big curve and little curve for letters like B, P, D, R. It was a really great program and he excelled very quickly. His handwriting was one of the best in the class after Handwriting without Tears. Best of luck! Oh, and they also had us use golf pencils, because they were smaller and you did not have enough room to grasp the pencil with a fist.