Abstract
This study investigated the Effect of Computer-Tutorial on Students Performance and Retention
in Orthographic Projection concept of Building Engineering Drawing in Technical Colleges,
Kaduna State, Nigeria. The study was guide by two purpose of the study, two research questions
and two hypotheses. The design of the study was Quasi-experimental research design.
Specifically, the pretest, posttest, post posttest non-randomized groups, two intact classes were
used for the study. The area of the study comprised six Technical Colleges in Kaduna State. The
Population of the study was 969. Comprising all the TS2 students from the six (6) Technical
Colleges. The sample for the study comprised 46 control group and 82 as experimental group.
The instrument used for the data collection was Computer Tutorial Performance and Retention
Test (CTPRT). Mean and standard deviation were used to analyze all the research questions.
Paired Sample t-test was used to test the hypotheses at 0.05 alpha level of significance. The
findings of the study revealed that; significant differences existed between academic
performance of students taught Orthographic Projection concept of building engineering drawing
using Computer Tutorial instructional strategy using experimental and control group in favour of
experimental group; among others. Based on the findings of the study, the recommends among
others; the use of Computer Tutorial should be encouraged for the teaching of Orthographic
Projection concept of building engineering drawing, by providing necessary facilities needed for
its effective implementationsKey Words: Orthographic Projection, Computer-Tutorial, Performance and Retention
Publication Date: 2026-03-13