The Primary Reading Inventory (TPRI) assessment was developed by the Texas Education Agency and the Children’s Learning Institute at the University of Texas Health Science Center.  El Inventario de Lectura en Español de Tejas (Tejas LEE) assessment was developed by the Texas Education Agency and the University of Houston. Liberty Source has offered its Tango Rx for TPRI and Tejas LEE product since 2004 as a comprehensive K-3 electronic assessment tool to assist teachers in capturing the key data quickly and accurately. 

TPRI and Tejas LEE meet the criteria for HB3. Learn more here!

iOS Option



Web Option


Tango Rx for TPRI/Tejas LEE expedites the assessment process, records audio of the student’s reading for further analysis, and provides critical one-on-one reading time for early readers.  After each administration, students are tagged with an RTI tier, Tango grouping factor, and small group assignment to assist teachers with intervention and instruction.

Benchmark and Progress Monitoring

Tango Rx for TPRI and Tejas LEE includes both a benchmark module to be administered three times a year and a progress monitoring module to be administered to struggling students every two weeks.  Tango Rx offers the complete suite of assessment tools for progress monitoring - PMER, PMBR, MPLE, and MPLP.

Dyslexia Screener

TPRI and Tejas LEE are recognized by the International Dyslexia Association as an effective screener for dyslexia. Many states have recognized the need for more comprehensive dyslexia screening and TPRI/Tejas LEE can assist in identifying those students earlier. Tango's reports help better target those students who would benefit from additional dyslexia review by a certified dyslexia specialist.

Tango Rx Platform

Tango Rx for TPRI/Tejas LEE is available on two platforms:

  • iOS (iPad, iPod, iPhone) which allows for connected or disconnected administration and reporting.  The audio recording feature is only available on the iOS platform.
  • Web-browser (desktop, laptop, netbook, other tablet) using a Chrome or Safari web browser.  

Tango Central Reporting

Tango Rx for TPRI/Tejas LEE sync to the Tango Central reporting engine which houses charts, graphs, lists, and other reports to assist with instruction and intervention.  Students are grouped based on ability with corresponding remediation activities to assist teachers in improving literacy at all levels.

Research-Based, Valid, and Reliable

For more information about the assessment tasks, research, white papers, and reading resources, please visit or


Tango Rx App Download

App can be downloaded from website or Apple App Store.

Ready to learn more about TPRI or Tejas LEE?  
Contact us and we will be in touch.