The oo letter combination has multiple sound possibilities: oo and ʊ and ŭ and so on.
So here is a new binder chart for one of these many sounds:
Get My Free Binder Guide!
The Teaching Reading with Bob Books method uses a special binder system in order to simply and easily tailor the frequency of review to the needs of each individual child. This free guide explains exactly what you need and how to build the TRwBB Binder so that you can get started teaching right away.