Examining mathematics teachers’ practices in assessing students’ performance was the major concern of this research study. A survey method was applied within descriptive research design. The population of the study was all the 6th and 7th grade mathematics teachers teaching in elementary schools of district Sargodha. The sample of the study was one hundred and forty mathematics teachers of tehsil Shahpur of district Sargodha. The data were collected through a questionnaire developed by the researchers themselves. The instrument measured the assessment practices i.e. Multiple choice questions, portfolio, anecdotal record, self and peer assessment, assignment as mentioned in the national curriculum 2006. Cronbach Alpha was used to assess the instrument reliability and its value was found to be 0.824. Differences in assessment practices on the basis of demographic variables independent sample t-test and Analysis of variance were applied. It was revealed that private school mathematics teachers were practicing assessment tools more extensive than public schools teachers. It was also found that public school teachers were not performing well in students’ mathematics assessment. Hence, it was recommended that government should provide them in-service training by conducting workshops and seminars to make them able to practice modern assessment techniques.