Science academic achievement is a key construct for examining students' science learning outcomes. While international comparative assessments like TIMSS and PISA have shown high science achievement of Korean middle school students, there is a lack of comprehensive investigation of factors influencing the achievement using domestic data.…

Background: Integrated science is a ubiquitous school subject that is an amalgamation of science disciplines; its teaching allows topics to be sequenced in any order and given various degrees of coverage and emphasis in the classroom. Ensuring canonical coherence, which is the logical organization of subject matter for effective instruction is…

Many are concerned about the large decline in K-12 student achievement since 2019. And rightly so, given what it signals about student learning and later life outcomes. Less noted is the pre-pandemic sustained decline in student achievement growth that followed 30 years of increases. We examine the nature of achievement decline as measured by…