Which one of the following methods is most suitable for teaching mathematics at upper primary level?

Activity-based learning is the most suitable method for teaching mathematics at the upper primary level. It engages students actively in the learning process through hands-on experiences, manipulatives, and exploration. This approach helps students construct their own understanding of mathematical concepts, makes abstract ideas concrete, and develops problem-solving skills. It aligns with constructivist pedagogy recommended by NCF 2005.