Research indicates an immersion program is most effective when students remain in the program for a sustained period of time. (pcschools.us)
Some children remain in the program for the entire year, and others graduate when attendance concerns are resolved. (educationworld.com)
We recommend that program staff follow the dosage prescribed by the model as closely as possible, but remain flexible to ensure families remain in the program long enough to benefit. (childandfamilyresearch.utexas.edu)