Peningkatan Keaktifan Belajar Melalui Model Numbered Heads Together Pada Materi Metamorfosis Kelas III SD

Abstract

Learning activeness in 3rd Grade of SDN Dukuh Kupang III/490 Surabaya was still uneven: instruction was teacher-centred, only a few pupils spoke up, and the class average on the metamorphosis topic stood below the minimum mastery criterion. This classroom action research aimed to describe the implementation of the Numbered Heads Together (NHT) cooperative model supported by a teacher-made diorama, and the resulting change in learning activeness. The study followed the Kemmis and McTaggart design of planning, acting, observing, and reflecting, carried out in two cycles on 15 and 16 September 2026 with 16 pupils holding complete observation records. Activeness was measured with an observation sheet covering three indicators derived from Diedrich's oral activities, namely expressing ideas, participating in discussion, and answering questions, each rated on a one-to-four rubric, and analysed descriptively. The mean activeness score rose from 75.00 in Cycle I to 89.58 in Cycle II. Pupils in the very active category doubled from five to ten, while the sufficiently active and less active categories disappeared in Cycle II. All three indicators improved, with discussion participation remaining the weakest. The findings should be read as evidence from this class rather than a generalised claim.