We can reject our null hypothesis at any reasonable significance level because our p value is virtually zero.  Therefore, we have sufficient evidence to say that the proportion of students at North Olmsted High School who use their cell phones during the day is greater than 0.25.  So, in reality, we expect that more than 25% of North Olmsted High School's students use their cell phones during the school day; which is going against the student cell phone rules.  The administrators would probably be interested to know that over 25% of students, despite their rules, still use their cell phone during school hours.