The competency-based curriculum (CBC) is a set of courses or syllabi, which promote learning areas in which the learner is gifted and skilled. The curriculum was adopted in Kenya in January 2017, when such a change occurs in education various stakeholders and resources are needed to be considered for smooth implementation. However, in Kenya, various stakeholders have expressed concerns regarding implementation of CBC. The purpose of this study was to find out the effects of monitoring of teaching and learning on the implementation of competency- based curriculum (CBC) in early childhood development (ECD) centres In Meru Central Sub-County. Lewin’s Theory of Planned Change guided the research. With adoption of descriptive research design, the study targeted 84 head teachers, 256 ECDE teachers and one Sub-County Curriculum support officers (CSO) in Meru Central Sub County. The study used a sample size of 14 head teachers, 51 ECDE teachers and the CSO in charge of education in the sub county. A simple random sampling was adopted to select participating schools and stratified sampling to select the head teachers, purposive sampling was used to consider ECDE teachers as the respondents for the study and the CSO. The main data collection tools to be used in this study included; questionnaire for head teachers and the ECDE teachers, interview schedule for the CSO and the observation guide that also guided the researcher on the availability of the instructional resources. The study quantitative data was analyzed using descriptive statistics modeled in percentages, mean and standard deviation while inferential statistics was correlated using Pearson product moment correlation. Qualitative data was analyzed using themes and prose. Discussion of the data was made, conclusion drawn from the findings and the study made conclusions recommendations and suggestions based on the research findings. The study found that that head teacher frequently monitors lesson attendance for effective implementation of CBC and invites quality assurance officers in school. The study concluded that Teachers held positive perceptions towards implementation of CBC as the head teachers were constantly following the curriculum implementation process right from classroom activities. The study recommended that the government should purchase more computers in schools for successful integration of technology in CBC program due to increasing population in schools. The purchasing of teaching and learning resources should also be prioritized especially for practical work and preparation of teaching aids for teachers.