The recent focus on AfL has shifted from defining its scope and extent to understanding its implementation, and research has revealed AfL implementation to be complex and contested. AfL implementation is especially challenging in national contexts that emphasise high stakes examination performance and grades. One such example is the nation state of Singapore, which recently implemented Assessment for Learning nation-wide in all its primary schools in the form of "bite-sized assessment." This article examines how bite-sized assessment in Singapore came to be implemented as a form of AfL, and how it was subsequently constructed as policy dictate, as opposed to being recognised as a form of best practice. A study of teachers' perspectives of bite-sized assessment practices in Singapore primary schools reveals inconsistency between policy intent and school implementation. An inquiry-based approach is recommended for teachers to frame AfL implementation as a practice to be understood, rather than a package of pre-determined practices to be administered.