When I was in high school, we had a block schedule, and it looks like my HS still uses similar block schedule with an additional block added in.
When I went, from what I recalled it was a 7 day block schedule, 7 blocks with 6 periods a day so one block was dropped a day (today it is a 8 day, 8 block with 2 blocks dropped a day - meaning a class is assigned block x and each day 2 blocks are dropped so that you have 6 classes a day). Lunch when I went was split into 3 sections of the largest period (1 and 1/2 hour with 1/2 hour for lunch) where depending on location of your class, you went first lunch, second lunch or third (if you had second lunch, then you had class for 1/2 hour, lunch for 1/2 and then return back to class for the last 1/2 hour). Some classes like ones with labs may be assigned a full block and an additional partial block for labs and electives may be partial block (i.e. block 1 for days A, C, E was music and block 1 for days B, D, F was art at one time for me).
Since it was a 7 day schedule, first week would be days A-E and then next Monday started on Day F-G and then cycle through.
It seemed confusing the first week when I went there, but then seemed like second nature after that. Most of us had the 5 core academics and then one block was for gym and lab (required) and then one was for electives or study hall/free period unless you had a class that needed more blocks (one honors English class took two blocks). In order to graduate, you had to take X number of electives from art/music/theater. But most of us usually had a free period at least half of the days.
