This study sought to examine the impact of teachers' participation in an extended period of embedded professional development (PD) emphasizing teachers' use of assessment for learning practices (AFL) in extended problem based units of instruction within a comprehensive AFL framework. The extended and comprehensive approach of using both course…

This study investigated the students' learning process of the concept of concentration at the elementary school level in Taiwan. The influence of different representational types on the process of proportional reasoning was also explored. The participants included nineteen third-grade and eighteen fifth-grade students. Eye-tracking technology was…