Based on the observation and summative test result, the researcher identifies that students' difficulties in learning quadratic equation and function was conceptual understanding. Conceptual understanding enables students to analyze, integrate, and apply a concept in different situations. The researcher used Reception-Oriented CAM with worksheets to improve students’ conceptual understanding and find the effective way to implement the method. The researcher used CAR with Pelton model as the research method. The subjects research were seven girl students class 10 1-3 in a Christian School Tangerang. It was conducted in two Plan Activations from September 19th - October 30th, 2018. The instrument used were test sheets, observation sheets, feedback sheets, and documentation. The data was analyzed quantitatively and qualitatively. The data result and analysis showed that the Reception-Oriented CAM with worksheets can improve students’ conceptual understanding in topic lesson quadratic equation and function. All students were improved their conceptual understanding. The effective way to implement Reception-Oriented CAM with worksheets was through implementing all the phases of the method thoroughly by giving more time in phase three and giving detail instruction for students.