Prevalence of tooth sensitivity was 68.4%. Presence of tooth sensitivity among these students was associated more with history of hard toothbrush use contrary to widely held belief that erosive agents were mostly responsible. Future studies are needed to provide more epidemiological data on tooth brushing and tooth sensitivity.
The study sought to find out the relative effectiveness of three classroom interaction strategies which are known to affect students' learning outcomes in Mathematics. 484 senior secondary school three (SSSIII) students randomly selected through judgmental and stratified random sampling from government-owned secondary schools in Ikere and Ado-Ekiti local government areas of Ekiti state participated in the study. The instrument was a self-constructed one, validated and used for collecting data and titled “Mathematics Achievement Test (MAT).” The experimental treatment lasted for four weeks, and the data collected were analyzed using one-way ANOVA, ANCOVA, two-way ANCOVA, and Tukey HSD post hoc pairwise comparisons analysis. The findings showed that the students' learning outcomes in Mathematics were better promoted by the cooperative and competitive strategies but rather minimally by both individualistic and conventional strategies.
This study was carried out to further search for the true position of boys and girls in terms of participation and performance in science in classroom settings that are different from the conventional or traditional arrangement. The paper examined the differences in the logical reasoning, linguistic, reading as well as word-problem solving abilities of male and female science students which are considered important to effective learning of science. Forty science students consisting of 20 each of male and female groups were involved in the study. Each group was taught by four science teachers of the same sex for a period of six weeks. The teachers had uniform qualifications. In addition to the subject matter taught processes of science were emphasized throughout the lessons. The study showed that girls have higher achievement scores than boys in logical reasoning, linguistic, reading and word-problem solving abilities. The differences in the scores were also found to be significant at 0.05 confidence level. It was therefore concluded that the issue of gender influence on students' performance in science is not straight jacketed. Boys perform better than girls only in conventional classroom arrangements and in the overall science tasks but not in some tasks that are also very crucial to the learning of science.
The chances of shoot-regeneration from embryo culture of Morinda citrifolia L. seeds was investigated. Germination on different strengths of MS and control (Sterile distilled water) started by two weeks after inoculation (WAI). At 6 WAI, 90% of the embryo had germinated from 25% MS followed by 80% in control, 70% from 50% MS and 40% each from 100 and 75% MS. Similarly, the same MS media strengths with basal application of 2.0/1.0 mg/l BAP/Kn affected the growth of regenerated Noni-plantlets. The longest shoot length (3.46 cm) and the number of nodes (1.75) were obtained from 75% MS while the highest number of leaves (7.25) was obtained in 100% MS between 4 and 12 WAI. The lowest value for these parameters were observed in 25% MS. This showed that mature zygotic embryo is good explant for the establishment of highly viable and re-generable plantlets of Noni.
Plant Tissue Cult. & Biotech. 30(2): 199-207, 2020 (December)
This study investigated the relative effectiveness of three types of concept maps (hierarchy, flowchart and spider) on the performance of students in Chemistry. This is with a view to find out which of the concept mapping types is more superior in enhancing students' performance in the numerical aspect of Chemistry. The pre-test, post-test experimental design was used for the study. The population for the study comprised of all the Chemistry students in Senior Secondary School in Osun State of Nigeria. Students in Senior Secondary class two (SSII) in their intact classes from three schools in Ife-Central local government area of the state formed the sample of the study. The three schools were randomly assigned to the hierarchical, flowchart and spider concept mapping strategies. The instrument used for data collection was the Problem Solving Achievement Test in Chemistry (PSATC). Students in the three groups were taught using the three kinds of concept maps separately. The experiment lasted for five weeks after which a post-test was administered. The result of the study indicated that there was no significant difference in the performances of the students in the three groups with respect to the kind of concept map used. (F = 1.088; p > 0.05). This implies that the concept mapping strategies were not all that different in their superiority. They all produced a similar effect on the students with respect to their performance in Chemistry. However, it was found out that they enhanced the performance of students in their problem solving skills in Chemistry as already reported by research studies.
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