Since you cannot say you are doing 4 Blocks, until you are
doing all Four Blocks , I recommend diving in with all
four at once. If you begin with Guided Reading and do it the 4
Blocks Way, then you must have Self-Selected Reading to provide
the students with at-their-level reading daily. Also, you will
need the Words Block to focus on the phonics skills they need,
as the focus in Guided is comprehension.
Sit down with your schedule and determine when you can fit each
of the blocks into your day. Go for 45 minutes in Writing and
GR with 30 in SSR and Words. (For me a half hour in Writing
and GR is never enough and feels rushed; plus I have many other
reasons). If you need some help with your schedule, post
back. The people on this board are great with providing help.