* Can use the program with any K—12 reading curriculum to support differentiated reading practice. *Includes hundreds of thousands of quizzes, including comprehension, vocabulary, and literacy skills quizzes, to students understand what they choose to read. * Integrates with optional early literacy and reading assessments to help teachers accurately pinpoint students’ individual reading levels and measure ongoing growth. *Uses an industry-standard measure (such as Lexile® measure, ATOS, or zone of proximal development) to determine text difficulty and recommend differentiated texts to students. *Supports reading practice for native Spanish speakers who are transitioning to English literacy by recommending Spanish-language texts. *Meets the requirements of Every Student Succeeds Act (ESSA) for strong evidence of efficacy. * Works with various popular devices, including Chromebooks and iPads. * Has professional development opportunities for educators.