The 52% reduction in the number of difficult NC concepts (from 25 to 12) indicates the efficacy of simulated
computer animation teaching strategies in clarifying to students the content elements that made the NC concepts
difficult to learn. The simulated computer animation strategies appear to reduce concept abstraction, concretizing
them, making it possible for the students to effectively visualise nuclear particles in the atomic nuclei, their
interactions, transformations and the changes that accompany these properties/behaviours. Thus students become
more able to learn the NC concepts and sub-concepts in more realistic and fruitful manner, thereby improving their
conceptual understanding of the NC contents of the curriculum.