Olayinka means to produce materials that is not

Olayinka (2016) concluded that Social Studies teachers must use
the essential teaching materials for their academic work and mustwork on ways
and means to produce materials that is not available. It is thus important for
the government, administrators and parents work hand-in-hand to produce
instructional materials for teachers of Social Studies to facilitate
instructional and improvements in the learning outcomes of the students.

The study found thatteaching aids are indispensable to the
effective teaching and learning activitiesand successful instructional delivery
inschools. Hence, instructional materials are necessary to enable students
acquire better knowledge and skills.This study also confirmed that themale
students in the experimental group have better statistically significant
meanscores and greater achievement than the male studentsin the control groups.
The male students taught withinstructional materials performed excellently than
those who were taught without them. The study discovered that there is
statistical significant difference between the achievement mean scores of
female students in the experimental and control groups. This findings also
indicated that there is no significant interaction effect of treatment and
gender on students’achievement in Social Studies.

Adipo (2015) found out that the research project indicated that
teachers have undergone an education system that had enlightened them on need
to know when, why and how to use manipulative effectively in the classroom as
well as opportunities to observe; first-hand impact of allowing learning
through exploration with concrete objects. According to findings the difference
in performance of children-respondents of the study was found to have a
significant difference between these who used instructional materials as
against to those who did use the instructional materials.  This shows that learners who are taught
mathematics with instructional materials learn best than those who are only learn
mathematics using lecture only.  The study clear manifests that the
improvement was due to the intervention made by using instructional material. Moreover,
the impact of instructional material was highest in the topic of money.  Study
recommends that learners be given instructional materials to utilize best
learning in mathematics. 

Nwike (2013) found out that the learners
instructed with instructional technologies learned better as compared to students
instructed without instructional materials. There is no actually significant
difference in the mean achievement scores of boys and girls learners. The null
hypothesis peg at 0.05 level of significance showed that there is actually significant
difference between the achievement result of those who used instructional materials
and those who did not use instructional materials. The recommendation was, that
instructional technologies be utilized in instructions in secondary level
because of its impact on student’s performance is positive.

Adebule (2015) likewise investigated the effectiveness of using
instructional material on the performance of the students in mathematics.  
The study was comprised of selected students using
pre-test and post as a mean to measure their achievements. Multistage sampling technique was done to select ninety
students from different secondary schools. A self-designed instrument was utilized
by the researcher. Then by using Multiple Bar
Charts, Achievement Mean Scores, the responses were analyzed. It was discovered that there were significant
difference between control (without instructional materials) and experimental
(with instructional materials) group. The study recommends the vigilant
supervision for the instructional materials be utilized efficiently and
regularly.

Akpan (2017)
made findings on the effect of instructional materials on the academic
performance of pupils.  The study
population comprised of all the students from the public and private primary
schools in Ikwuano Local Government Area of Abia state. The simple random
samplings technique was used for the selection of the sample and 300 pupils
made up the sample for the study. The instruments for data collection were a
questionnaire and the result of a post-test. Data collected were analyzed using
simple mean and percentage. The findings were that the children who were taught
with instructional materials performed better than those who were not. It was
recommended that teachers should be made to undergo seasonal trainings to
acquaint themselves of the modern trends in instructional technology; they
should make out time for improvisation of instructional materials; an
instructional material bank should be located within the reach of the teacher
for easy access; there is the need to explore and expand the scope of
instructional materials from charts, and pictures to overhead projectors,
slides and web-based instruction which will require satellite receiver,
computer, television, electronic boards etc.