Structured English Immersion (SEI) and Two-way dual immersion programs

DQ 1: Recently, Sheltered English Instruction, also known as Structured English Immersion (SEI), has replaced bilingual education in a few states. Arizona is one of those states. Looking at the SEI model and bilingual education model, compare and contrast these two methods, citing advantages and disadvantages of each. As a future educator, which model would you prefer to see implemented and why?

DQ 2: Two-way dual immersion programs are gaining popularity in many states. As a future educator, what are your thoughts on this type of program for ELLs? What information from the assigned readings and videos support your opinion?