The bulk of the class period today needs to be focused on completing the activity and discussing the answers, however you chose to allow students to work through the questions. Therefore, your opening hook is short. I have linked three optional videos from Youtube that are all short, about two minutes long, and show retro technology. I suggest opening with these so students are interested in the activity and again get a sense of the history of computers and cell phones. Technology changes fast!
Complete the remainder of the questions and student lead presentations of solutions with time for questions and clarification. How you complete the activity really depends on how you started the work yesterday. As a reminder, here are the various suggestions I made for working through the activity, depending on the needs of your students.
Close the activity by preparing students for the following day's work. Tell students they are about to further this work with scientific notation by beginning a formative assessment lesson. Students will be re-grouped tomorrow so be ready to sit with new partners. The class will begin a fun card match activity to further guide their thinking about applying scientific notation. Make sure the student card sets on pages S-2, S-3, and S-4 are copied and cut before tomorrow as I discussed in the lesson plan yesterday.