I think that preparing for the COBE requires that they do the things they can't stand...SPEAK. They can't stand listening to their voices. I work with them in both receptive (vocabulary, reading comprehension question, how many questions etc) and tons of productive skills.
I have never prepared my students for BOOST. I imagine they would need practice in receptive activities. However, I believe that they need tons of productive activities. In addition, I invest in LOTS of confidence building skills. Rebecca