Gautam, Khil Nath2023-03-132023-03-132015https://hdl.handle.net/20.500.14540/15677There are many problems in the field of teaching and learning process. Most of the teachers and students think that mathematics is a complicated subject for teaching and learning. In mathematics teaching teachers face many problems to give clear concepts to the students. It is clear that use of instructional materials make teaching learning process easier. Instructional materials assist pupil to enhance their memories. Usually, pupils can remember concrete materials in longer periods ratherthan abstract facts. With the help of teaching aids teacher do not need much to explain the certain concept by using many words.Using teaching aids teacher can save a lot of time because it is no longer required to write notes on the boards for the pupils to copy. So the teacher plans to study the effectiveness of instructional materials in teaching mensuration of primary level. This study focused on the effects of instructional materials on performance of pupils taught by using instructional materials and without using instructional materials.Total 55 students were selected from grade-v students of Saraswati Higher Secondary School,Damak-14,Jhapa. Students of two sections were selected. The pre-test, post-test non-equivalent group design was adopted in carrying out the study. The experimental group was taught with instructional materials while the control group was taught with chalk and talk alone. Pre and post test was administered on both groups before and after the treatment. The data generated were analyzed using t-test statistics at 0.05 level of significance. A significant difference existed between the post-test performance of pupils in the experimental and control groups. Finally, the researcher concluded that the achievement of students of experimental group is better than the achievement of the control group. So teaching of mensuration by using instructional materials causes better achievement than teaching with out using instructional materials in grade-V.en-USInstructional MaterialsMathematics teachingTeaching MensurationThesis