Open-Source Collaboration to Assess the Text Complexity, Helping to Read and Write in Spanish-Speaking Schools

In this paper, we describe the role of open-source tools to develop educational systems. In particular, we describe TRUNAJOD, an open-source library to extract readability indices from texts, and how it was used to develop a tool to analyze text complexity of school texts to ease the workload on teachers when selecting a text for a particular reading comprehension task. This educational tool helps the user to calibrate or select texts based on the target school level and desired complexity for the task, offering additionally important development possibilities for writing assessment.