The purpose of the study was to investigate the classroom assessment practices of secondary school teachers in Shiwang'andu District, Muchinga Province, Zambia. The objectives were to: describe the assessments that were being used by teachers in sampled schools; determine teachers' use of classroom assessment results; as well as establish viewpoints of teachers about classroom assessments. The study adopted a descriptive survey design and targeted 62 respondents from 10 selected secondary schools including the District Education Board Secretary (DEBS) office. Simple random sampling was used to sample the teachers, while the Heads of Department and Head teachers were selected conveniently. Purposive sampling was used to sample the District Education Standards Officer (DESO) and the District Resource Centre Coordinator (DRCC). Questionnaires and key informant interviews were used as data collection tools with descriptive statistics and narrative analysis used as data analysis methods for quantitative and qualitative data respectively. The study established that there were more secondary school teachers that use traditional assessments (71%) as compared to those that use contemporary assessments (29%) in sampled schools. Additionally, most respondents (42%) said that they used classroom assessment results to point out the difficult learning areas, identifying what pupils think and how they think and what they understand. 34% of the respondents use classroom assessment results to diagnose the effectiveness and drawbacks of teaching methods. 24% of the respondents indicated that they use classroom assessment results to make decisions regarding pupils' grade retention and promotion. The results also indicate that the majority of the respondents (48%) were of the view that pupils should only recognize rather than generalize their own answers in classroom assessment tasks and the teacher should only evaluate the pupils based on mastery of skills and knowledge. 29% of the respondents indicated that pupils must be assessed in diverse modes and the teacher must give assessments that match with pupils' development level. 23% of the respondents said that pupils must be assessed beyond classroom environment and the teacher to give assessments that promote higher learning skills and problem solving. The Zambian Ministry of General Education and school administrators in Shiwangandu District should ensure that all teachers with teaching certificates go for further training and take more courses in assessment to improve their skills and use of up-to-date desirable classroom assessment practices.