The development of a valid and reliable instrument and related procedures for the assessment of practice teaching is often a protracted exercise requiring inputs from various stakeholders. This paper discusses the challenges of developing such an instrument by the Joint Board of Teacher Education (JBTE) of the University of the West Indies (UWI), Mona campus, to replace an existing instrument which had been in use for several years, as part of the effort to reshape the assessment of the practicum which forms an important part of the initial teacher training programmes of the JBTE.