Alter or Adapt?

Faced with starting to teach my unit plan in ONE week, I am starting to contemplate how I might have to adapt my lesson plans. I purposely made sure that I really jam-packed all my days, because when I interviewed the principal at the school he really emphasized that he wanted the students to be learning from bell to bell every single day of the week. Knowing that, and also realizing that our professors, supervisors and students would want there to be interesting stuff to do during the class period, I really tried to integrate student-centered activities into every lesson plan. However, I realize, as Dr. Kist pointed out in my evaluation, that activities and projects can be time consuming, or even overwhelming for students.
I think I am going to see how the first couple days go, as far as, students' pace, and then hopefully I will have a better understanding of if or how I could alter or adapt my lessons plans to fit my students needs. Even if it might mean cutting out some of my well thought plans.
This sort of reiterates one my major thought processes when it comes to education. I believe one of the best things a teacher can bring to a classroom is flexibility. It allows you to adapt to different learners, navigate classroom environments and hopefully, pull off unit plans.