This study describes the process of defining a hypothetical learning progression (LP) for astronomy around the big idea of "Solar System formation." At the most sophisticated level, students can explain how the formation process led to the current Solar System by considering how the planets formed from the collapse of a rotating cloud of…

This study investigated the associations of psychological and social variables with the likelihood of exhibiting three different behaviors as a bystander in a bullying situation. The sample comprised 238 Korean-American and Korean students, from the 3rd to 12th grades, studying in the USA. Students receiving classmate support showed a lower…

This study used an exploratory mixed methods design to address the questions: (1) "Is there a positive language of youth purpose, and if so, what is it like?" and (2) "Which kinds of purpose best predict reports of positive states and coping styles?" Qualitative coding identified references to positive states and coping…