The current study explores the conceptual understanding of secondary level students in
mathematics. The participants were 1320 students of 10th grade and 180 students of 11th grade
randomly selected from 33 public secondary and 17 higher secondary schools of Lahore. The article describes the
performance of students on six grade 1-7 level questions related to numbers, number operations, and algebra. One
question was knowledge level and rest five were analysis level questions. Four questions were related to Knowledge
of primary level Content and Students that required participants to analyze the error or explanations related to the
problem. The other two questions were related to middle school content knowledge. The questions were adapted
from Hill et. al. (2004)s instrument of Study of Instructional Improvement (SII). The success rate of students was
ranging from 52.8 to 63.8 % on six questions and from 22 to 73.5 % on 15 sub-questions.
1-Namirah Aslam PhD Scholar,Department of Research and Evaluation, Lahore College for Women University, Lahore, Punjab, Pakistan.2-Aishah Siddiquah Assistant Professor, Department of Research and Evaluation,Lahore College for Women University, Lahore, Punjab, Pakistan. 3-Mobeen Ul Islam Assistant Professor,Department of Education,University of Gujrat, Gujrat, Punjab, Pakistan.