No. With process writing, youngsters who master the writing objectives for their grade level shouldn’t just move up another difficulty notch, as is often the case. Instead, they should be allowed to pursue enrichment assignments or projects of their choice.
The same holds true for the whole language approach. If students show mastery of the learning objectives, simply replacing time with grade level trade books, for example, may not be the best option. The alternatives presented must be challenging, and keyed to students’ interests.