Investigations of Experiential Cooperative Concept Mapping Instructional Approach on Secondary School Girls’ Achievement in Physics in Nyeri County, Kenya

This study investigated the effects of Experiential Cooperative Concept Mapping Instructional Approach (ECCA) on girls’ achievement in Physics in secondary schools. The study employed Quasi- Experimental Research Design represented by Solomon Four Non-equivalent Control Group Design. Stratified sampling technique was used to select 8 Secondary Schools from girls’ alone and co- educational schools strata drawn from Nyeri County. A total of 334 Form Two students were involved in the study.  A validated Students Physics Achievement Test (PAT) with a reliability coefficient of 0.80 was administered. The experimental group I and III were exposed to ECCA while the conventional Method was used for the control group. Two groups were pre-tested prior to the implementation of the ECCA treatment. After five weeks, all four groups were post-tested using the Physics Achievement Test (PAT). Data was analyzed using ANOVA and ANCOVA at a significance level of alpha (?) equal to 0.05.  The results of the study revealed significant effect on achievement of girls when ECCA was used. However there was a significant effect in achievement on school type in favour of girls’ alone class performing better than girls in co-educational class when ECCA was used. The investigations concludes that ECCA is an effective learning strategy which physics teachers should be encouraged to use in their teaching/ learning process in order to address the current low girls performance. This may create an increased pool of scientific and technical female workers in the area where Physics is a requirement. Key words- Experiential Cooperative Concept Mapping (ECCA), Conventional Methods (CM), Secondary School, Girls’ Achievement, Physics, Nyeri County

Effects of Experiential Cooperative Concept Mapping Instructional Approach on Secondary School Students’ Motivation in Physics in Nyeri County, Kenya

This study aimed at finding out the effects of Experiential Cooperative Concept Mapping ECCM on students’ motivation to learn Physics. Solomon Four Non-equivalent Control Group Design under the quasi- experimental research was used. A stratified random sample of 12 Secondary Schools was drawn from Nyeri County. Four boys’ alone, four girls’ alone and four co-educational schools were randomly assigned to four groups with a total of 513 Form Two students. Students in all the groups were taught the same Physics content of Magnetic Effect of Electric Current. The experimental groups were taught using ECCM approach while the control groups were taught through Regular Teaching Methods (RTM). Two groups were pre-tested prior to the implementation of treatment. After five weeks, all four groups were post-tested using the Student Motivation Questionnaire (SMQ). The instrument was validated and pilot tested before use. The reliability coefficient for SMQ was 0.81.  The instrument was scored and data analyzed using t-test, one-way ANOVA and ANCOVA at a significance level of alpha equal to 0.05.  The results of the study revealed that there was a statistically significant difference between the motivation to learn of students who were taught through ECCM and those taught through RTM. The researchers recommend the used of ECCM in addressing motivation of students towards learning physics. Keywords: Experiential Cooperative Concept Mapping (ECCM), Regular Teaching Methods (RTM), Secondary School students, Physics, Motivation, Nyeri County

The Biological Assessment and Rehabilitation of the World’s Rivers: An Overview

The biological assessment of rivers i.e., their assessment through use of aquatic assemblages, integrates the effects of multiple-stressors on these systems over time and is essential to evaluate ecosystem condition and establish recovery measures. It has been undertaken in many countries since the 1990s, but not globally. And where national or multi-national monitoring networks have gathered large amounts of data, the poor water body classifications have not necessarily resulted in the rehabilitation of rivers. Thus, here we aimed to identify major gaps in the biological assessment and rehabilitation of rivers worldwide by focusing on the best examples in Asia, Europe, Oceania, and North, Central, and South America. Our study showed that it is not possible so far to draw a world map of the ecological quality of rivers. Biological assessment of rivers and streams is only implemented officially nation-wide and regularly in the European Union, Japan, Republic of Korea, South Africa, and the USA. In Australia, Canada, China, New Zealand, and Singapore it has been implemented officially at the state/province level (in some cases using common protocols) or in major catchments or even only once at the national level to define reference conditions (Australia). In other cases, biological monitoring is driven by a specific problem, impact assessments, water licenses, or the need to rehabilitate a river or a river section (as in Brazil, South Korea, China, Canada, Japan, Australia). In some countries monitoring programs have only been explored by research teams mostly at the catchment or local level (e.g., Brazil, Mexico, Chile, China, India, Malaysia, Thailand, Vietnam) or implemented by citizen science groups (e.g., Southern Africa, Gambia, East Africa, Australia, Brazil, Canada). The existing large-extent assessments show a striking loss of biodiversity in the last 2–3 decades in Japanese and New Zealand rivers (e.g., 42% and 70% of fish species threatened or endangered, respectively). A poor condition (below Good condition) exists in 25% of South Korean rivers, half of the European water bodies, and 44% of USA rivers, while in Australia 30% of the reaches sampled were significantly impaired in 2006. Regarding river rehabilitation, the greatest implementation has occurred in North America, Australia, Northern Europe, Japan, Singapore, and the Republic of Korea. Most rehabilitation measures have been related to improving water quality and river connectivity for fish or the improvement of riparian vegetation. The limited extent of most rehabilitation measures (i.e., not considering the entire catchment) often constrains the improvement of biological condition. Yet, many rehabilitation projects also lack pre-and/or post-monitoring of ecological condition, which prevents assessing the success and shortcomings of the recovery measures. Economic constraints are the most cited limitation for implementing monitoring programs and rehabilitation actions, followed by technical limitations, limited knowledge of the fauna and flora and their life-history traits (especially in Africa, South America and Mexico), and poor awareness by decision-makers. On the other hand, citizen involvement is recognized as key to the success and sustainability of rehabilitation projects. Thus, establishing rehabilitation needs, defining clear goals, tracking progress towards achieving them, and involving local populations and stakeholders are key recommendations for rehabilitation projects (Table 1). Large-extent and long-term monitoring programs are also essential to provide a realistic overview of the condition of rivers worldwide. Soon, the use of DNA biological samples and eDNA to investigate aquatic diversity could contribute to reducing costs and thus increase monitoring efforts and a more complete assessment of biodiversity. Finally, we propose developing transcontinental teams to elaborate and improve technical guidelines for implementing biological monitoring programs and river rehabilitation and establishing common financial and technical frameworks for managing international catchments. We also recommend providing such expert teams through the United Nations Environment Program to aid the extension of biomonitoring, bioassessment, and river rehabilitation knowledge globally