1. Rather than considering the sampling distribution of the sample percentage, p, you could consider the sampling distribution of the number of heads in 50 penny spins.
2. Suppose you had spun the penny only 10 times and had obtained the sequence TTHTITHHHT. We can break this into groups as TT H TIT HHH T and say that the sequence of 10 trials contains a run of 2 tails, then a run of 1 head, a run of 3 tails, a run of 3 heads, and a run of 1 tail. There are 5 runs here, the longest of which has length 3.
Look at the sequence of 50 heads and tails you obtained and divide the 50 trials into runs of heads and tails. Find the length of the longest run in your 50 trials. Combine your value with those of the other students in your class in a dot plot