90:10 MODEL
- In the 90:10 dual language immersion (DLI) model, the target language is used in kindergarten for 90% of the instructional time and English is used for 10%.
- At each grade level, the amount of instruction in English rises by 10%, as per the charts, below, and is considered a "sequential literacy" model , as literacy in the target language is developed before moving on to formally developing literacy in English.
*For many programs, the percentage in the target language is reduced further at the secondary level, often to 30%-40%, or a minimum of 2 courses/classes, for reasons that include lack of highly qualified biliterate teachers with a secondary credential in the various subject areas.
