Teaching Selected Topics in Geometry Using Manipulative Instructional Materials Among Grade 7 Students in Community Vocational High School
Rubelyn Ramos
Discipline: Education
Abstract:
With the advancement of learning management,
the researcher employed quasi-experimental method of research
using the pretest and posttest group design with sixty Grade 7
students, of whom thirty were taught using manipulative
materials and other thirty were taught without manipulative
materials. The level of pretest performance of the control group
for the undefined terms, angles and polygons are 6.63, 6.50 and
6.97 which described as low while the posttest of the control
group are 12.83 high, 11.53 average and 12.93 high. Also, the
experimental group, 9.13 average, 6.50 low and 10.23 average
while the posttest of the experimental group are 17.93 very high,
15.73 high and 14.23 high. Moreover, the difference in the level
of pretest and posttest performances of the control group for the
three indicators mentioned is shown by the computed t-value of
7.68, 8.11 and 7.96. While, in experimental group the computed tvalue of 15.77, 18.47 and 6.66 which both group exceeded the
critical-t value of 1.70 with 29 degrees of freedom. Therefore, the
null hypothesis is rejected and there is significant difference
between the variables. In addition, the difference in the level of
pretest performance of the control and experimental groups for
the three indicators are 3.19 rejected for the undefined terms, 0
accepted for the angles, and 4.58 rejected for polygons. There is
no significant difference in the level of pretest performance of
control and experimental groups in angle, while the two
indicators have significant difference. For posttest level, there is a
significant difference in undefined terms and angles with 5.12
and 5.35, and no significant difference in terms of polygons with
1.64 compared with critical-t value of 1.67 of 58 degrees of
freedom. Considering the results, the instructional design was
crafted to help the teachers in managing day to day lessons in
Geometry.
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