Active-learning versus teacher-centered instruction for learning acids and bases

The prevalence of the ideas of Year I undergraduate biology students about the consequences, causes and cures of the 'greenhouse effect' was determined using a closed-form questionnaire, and the results compared with a parallel study undertaken nearly 10 years ago. Many of the students in the present study were unaware of the potential effect of global warming on the distribution of crop pests, or that ground level ozone acts as a 'greenhouse gas'. Prevalent misconceptions were that global warming is caused by increased penetration of solar radiation, that it is connected with holes in the ozone layer, that it would result in increased skin cancer, and that use of unleaded petrol would reduce it. There appeared to be a general conflation of thinking about global warming and ozone layer depletion. Despite an increased certainty about the existence and effects of global warming among experts, the results are broadly similar to, and certainly no better than, those obtained with an equivalent group of students in a previous study, suggesting that despite media publicity and inclusion of the issue of global warming in the formal curriculum, insecure knowledge and misconceptions persist.     

Examining activity-based learning (ABL) practices in public basic schools in the northern region of Ghana

Background: Ghana has been the testing ground for many teaching and learning initiatives over the past 15–20 years. These initiatives, largely funded by donors, have sought to improve learning by introducing and reinforcing valuable teaching skills, materials and approaches, most of them child-friendly, learner-centred and involving activity-based learning (ABL). However, a problem in Ghana, also true of other countries in sub-Saharan Africa, is that whereas efforts over the past few decades have improved access to basic education in both pupil enrolment rates and teacher numbers, educational quality as measured by standardised test scores in key subject areas remains rather low.

Purpose: This article reports on an aspect of a DfID (Ghana) – sponsored research project which examined how the quality of teaching and learning in Ghanaian basic schools could be improved through the utilisation of ABL pedagogy. The current article examines three overarching themes relative to ABL pedagogy, namely how participants conceptualise ABL; ways in which ABL practices reveal themselves in classrooms; and challenges of ABL practices in Ghanaian schools.

Sample: Participants (comprising representatives of Colleges of Education, District Directors and frontline Deputy Directors of Education, headteachers and teachers) were drawn using purposive sampling technique from eight schools from within four districts of the northern region of Ghana.

Design and Methods: A case study approach was adopted for the study. Data collection took the form of semi-structured interviews, focused group discussions and observation of ABL practices and lessons in selected schools. Data analysis was undertaken using a ‘processual analytical approach’ with the view to catching realities of ABL practices in the Ghanaian educational setting.

Results: Our analysis reveals that whereas the literature on ABL emphasises multi-tasking and group work as essential ingredients of ABL pedagogy, the respondents conceptualised this as meaning pupils working on the same activity-related tasks at the same time in groups. Similarly, we found that, ideally, ABL practices reveal themselves through classroom practices such as display of pupils’ work in classrooms, organisation of the seating arrangements of pupils in groups, use of teaching and learning materials, formative assessment and activity-oriented lessons among others. However, in almost all the schools and classrooms we visited, these essential ingredients were missing owing to congestion and lack of furniture and logistics.

Conclusions: We conclude against the backdrop of our findings that ABL techniques can be utilised more effectively in Ghanaian schools if its practices are initially promoted in model schools, for lessons to be learned, and then scaled-up as expertise is established in these model schools.     

The acquisition and transfer of knowledge of electrokinetic-hydrodynamics (EKHD) fundamentals: an introductory graduate-level course

Relevant engineering applications, such as bioseparation of proteins and DNA, soil-cleaning, motion of colloidal particles in different media, electrical field-based cancer treatments, and the cleaning of surfaces and coating flows, belongs to the family of ‘Applied Field Sensitive Process Technologies’ requiring an external field to move solutes in a fluid within a fibrous (or porous) domain. This field incorporates an additional variable that makes the analysis very challenging and can create for the student a number of new problems to solve. A graduate-level course, based on active-learning approaches and High Performance Learning Environments, where transfer of knowledge plays a key role, was designed by the Chemical Engineering Department at Tennessee Technological University. This course, where the fundamentals principles of EKHD were taught to science, engineering and technology students was designed by the Chemical Engineering Department at the Tennessee Technological University, Cookeville, TN. An important number of these students were able to grasp the tools required to advance their research projects that led to numerous technical presentations in professional society meetings and publications in peered-reviewed journals.     

微生物学求知式教学试验

传统的微生物学教学方法,学生学习被动,教师授课费劲。为了改变这种状况,本试验取求知式教学和传统教学两种方法进行比较。其中,求知式教学分为惊讶、疑问、求知、索答、梳理完善、考试测评共6个学习段。经过试验并采用教师教学网上评估系统进行评价,结果表明,求知式教学法以“非常好”和“好”的评价分别显著高于传统法(p<0.05);以“一般”和“差”的评价分别显著低于传统法(p<0.05);以网上综合打分平均92.56分极显著地高于传统法的86.20分(p<0.01);考试通过率98.66%,显著地高于传统法的94.38%(p<0.05)。求知式教学能诱发学生的求知欲,有效地提升了学生主动学习意愿,同时能使教学课堂气氛充满活力,教师与学生的激情都能得到刺激与释放,教学效果能得到显著提高。