Hi J.-
My twins are in first grade and what has worked so well is having a schedule typed and put on a kitchen wall (or you could put it on the refrigerator.) In kindergarten I actually had them daily check off things that needed to be done before they went to school such as check backpack, put clothes on, brush teeth, etc...
Having a routine that is typed makes so much sense because it is a visual reminder at what needs to be done. (I am a former teacher and I remember just how much my students benefitted from reading a schedule. It will help you out, too, since I know you need to do many other things considering you have twins that are only a yr. old. In my experience, kids love having written/typed schedule because it puts them in control. You are not having to constantly reminding them to brush their teeth, use the bathroom, etc... You might have to remind your son to read the scedule for awhile so he can see what comes next with the routine. Have him help you decide what order things should be done in. Don't read him the list, rather have him read what should be done next. (He's eight yrs. old... let him feel confident and in control.)
I typed the routine out in two rotating colors and made the font bigger so it printed out on two sheets of paper. I glued the papers together so it's one long list and I even put red colored poster board behind it. (Having a duplicate copy of schedule in his room might be helpful too.) I put some fun stickers around the poster too.
My twins rotate bath nights. The other child will spend time with me or my husband or have some computer time, while the other one is taking a bath. Bathtime is over by 7:15. A simple snack is offered at 7:30 such as fruit or yogurt. Then bathroom time at 7:45. As a family, we read together on my bed from approx. 8:00 to 8:20. Then cuddle until 8:30. At 8:30 they get tucked in their own beds- light out! (If it is not a school night, I will let them stay in their own rooms from 8:30 til 8:45 or 9:00 to do a quiet activity such as independent reading or drawing.)
(They love this additional time... they look at it as such a privledge.)
My daughter's teacher asked her class what time they go to bed and my daughter said almost all the kids said 8:00. One girl reported 7:30 and two kids said 9:00. On school nights, 8:30 works for my family.
Take care,
J.