Lee, Yew-Jin

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 therefore necessary for meaningful student learning to occur.

Purpose
We examine the coherence as well as closely related ideas of coverage and emphasis of the integrated science curriculum and textbooks from Singapore. Such an analysis has not been attempted before, which might shed light on strong student achievement reported from this region in this subject.

Methods
Coherence was determined by finding buttress topics and upper triangular patterns based on a list of standard science topics––these inter-related curricular features aid in conceptual learning of a subject. We also investigated questions about coverage and emphasis from the number of learning outcomes, topics in curriculum and textbooks, and page surface area of textbooks following past TIMSS research.

Results
Three buttress topics and two upper triangular patterns in life and physical science disciplines were found, but not among earth science topics. Two topics were strongly emphasised in the curriculum and textbooks––organs, tissues and physical properties of matter––and there was a close alignment between topics in the curriculum and textbooks. Integrated science here was relatively restricted compared to three other high-performing East-Asian regions, but there was a common strong emphasis on physical science topics.

Conclusions
Integrated science in Singapore has shown some evidence of coherence in its curriculum and textbooks that have also emphasised physical science topics. Because learning outcomes here were intentionally trimmed due to past general educational reforms, the findings lend tentative support to arguments stating that a reduced, but well-designed science curriculum has benefits for learners.