The school district's Two-Way Immersion (TWI) program development and guidance falls under the ELL department. The department researched, planned and implemented the program during the 2008-2009 school year. Currently three elementary schools have a TWI "strand" beginning with kindergarten at two schools and with pre-kindergarten at one school. The ELL department is responsible for providing support for the TWI programs and continues to focus on process improvement initiatives. The department evaluates the TWI program implementation as well as the language proficiency of the students in both English and Spanish.