I recommend writing an email to phonics road. I asked the same question about PR and IEW and Barbara Beers wrote back herself and said that a separate writing program was NOT necessary. AND in talking to friend who is in PR3, she said that the writing completed through the Literature work was very similar to IEW, but not quite so formulaic. Both encouraged me that the writing was coming!! I don't know much about the Bridge though. As for me, I still feel like I might look at the teacher cds for IEW. Why? Just because I don't want to miss anything. UGH!