I also teach on a modified block schedule (47/47/95/47). This is my third year working with the curriculum and I am getting better at fitting all the content in. I have a better sense of urgency in the beginning of the year now that I have experienced the end of the year crunch.
On paper, I have over 100 hours of class time. However, like @eric.howe stated, the various disruptions to the schedule makes it challenging to engage students in the curriculum for those hours. I have skipped, combined or altered lessons to fit the needs of my students. My students range in levels of both motivation and personal responsibility. My general policy is that unfinished classwork becomes outside of class work. Our IT lab is open most days during lunch and occasionally after school to accommodate students without access at home. This forum and PD has been very helpful with adapting the curriculum to fit my classroom.
Happy computing,
Andrea