This most successful informal reading inventory has been adapted to meet the strong demand for K-12 teachers to assess Spanish-speaking students in their native tongue. Taking a constructivist approach, the authors combine both traditional and holistic methods to determine a student's reading level. Since it can assess a student's reading competency in Spanish as well as English, this inventory is particularly valuable considering the influx of English as a Second Language (ESL) students and Spanish-speaking students in the public schools. Teachers of grades K-12.