• Directory of
  Two-Way Programs
• Guiding Principles for Dual Language
• Frequently Asked Questions
• Tools for Practitioners
  • TWI Glossary
  • Spanish Standards and Benchmarks
  • Language of Literacy Instruction
  • Spanish-Language Assessments
  • Evaluator's Toolkit
  • TWI Toolkit
  • Two-Way SIOP (TWIOP)
• Publications and Bibliographies
  • TWI Research Bibliography
  • Publications and Resources
  • CAL/CREDE Study Bibliography
• Services
• Projects

For more information

TWI Directory Tables

Growth of TWI Programs, 1962-Present

Click the thumbnail above to view the full-sized chart.

Click here to view the data for this chart.

Please Note: This chart only includes programs which are currently open.

Also note that the Directory is made up of programs that have contacted us. The slower rate of growth in the last few years may be attributed to the fact that we do not know about new programs, rather than an actual slow-down in the rate of growth of two-way immersion.