This research investigated the impact of using manipulatives on 56 Grade 5 students’ (27 male, 29 female; age 10-11 years) mathematics achievement. A quasi experimental, action research design was utilized in which the experimental group was taught selected topics from the Number strand using manipulatives during a 3-week intervention, while the control group’s instruction did not include the use of manipulatives. Data were collected using a pre- and post-test and analysed using descriptive statistics and a Mann-Whitney U test.