scholarly journals Representing Variability: The Case of Life Cycle Diagrams

2020 ◽  
Vol 19 (3) ◽  
pp. ar49
Author(s):  
David Menendez ◽  
Olympia N. Mathiaparanam ◽  
David Liu ◽  
Vienne Seitz ◽  
Martha W. Alibali ◽  
...  

An examination of life cycle diagrams from books and from an online database of science diagrams is presented. Many diagrams contained many irrelevant details, depicted the life cycle as a closed circle, and did not depict any form of biological variability. How these features might influence student learning and biological reasoning is discussed.

2019 ◽  
Vol 1 (1) ◽  
pp. 87-102
Author(s):  
Nurhaningtyas Agustin ◽  
Munthofi’ah

Learning is a way for someone to gain knowledge through experience, remembering, and getting information / finding. Teaching through providing experience in finding his own knowledge, it is hoped that these lessons will be meaningful for students. This study aims to find out about the application of inquiry learning models, improve student learning achievement through inquiry models, student responses to the application of inquiry learning models in science subjects the subject matter of life cycle in class V MI Sunan Kalijogo Wolutengah Kerek District, Tuban lesson year 2017/2018. This research is a type of Classroom Action Research (Action Classroom Research). The data in this study are data on increasing the learning achievement of science subjects in the life cycle with inquiry learning models. Data analysis was carried out by observing student activities, questionnaires to determine student responses that were calculated in the form of percentages, and data from student evaluation results. From the implementation of this study the results were obtained (1) that the application of inquiry learning models in science learning the subject matter of the life cycle of living things can improve student learning achievement. The increase can be seen from the learning outcomes achieved by students in the first cycle and second cycle which are significant. (2) student learning achievement has increased after the implementation of inquiry learning models. After the application of the inquiry learning model in the first cycle the average value of students was 62.63, in the second cycle it increased to 81.84. Increased activity of students in observation or group discussion, in the first cycle 52.63%, in the second cycle to 84.21%. The accuracy of completing the chart or table of observation in the first cycle is 57.89%, in the second cycle becomes 84.21%. The activity at presentation in the first cycle was 15.79%, increasing in the second cycle to 57.89%. The intensity of play alone decreased from 31.58% to 15.79% in cycle II. (3) Positive student responses, indicated by 17 students (89.47%) liked the application of the inquiry learning model, and 2 students (10.53%) did not like because they felt left behind from their friends. The results of this class action research can be categorized as successful in its implementation. The conclusions from the results of this study that the application of inquiry learning models in science subjects the subject matter of the life cycle in class V MI Sunan Kalijogo Wolutengah Kerek District, Tuban Regency 2017/2018 school year can improve student learning achievement.


JANACITTA ◽  
2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Alda Shafira ◽  
Feny Rosayanti ◽  
Sunan Baedowi

ABSTRACTInfluence Of Learning Model Picture And Picture Assisted Media Respective Wheel Games To Activity And Learning Results On The Concept Of Animal Life Cycle Students Of  Class IV This research is motivated by low learning activities that affect student learning outcomes and ultimately student learning outcomes do not reach KKM. This study aims to determine how much influence the model of learning picture and picture assisted media game wheel of luck to the activity and student learning outcomes on science subjects class IV SDN Sendangmulyo 02 Semarang. The form of this research is quantitative research with Quasi Experimental Design design with Non-equivalent Control Group Design design. Sampling technique used is Nonprobability. The population of this study is all students of class IV SDN Sendangmulyo 02 Semarang. Data collection techniques in this study using documentation, observation, tests and interviews. Data analysis techniques consist of normality test, homogeneity test, completeness test and t test. Data analysis using t test obtained result 4,452 bigger than t table that is 1,990. The result of the research shows that the use of picture and picture learning model with the media of wheel of lucky game has an effect on the activity and the result of learning of fourth grade students of SDN Sendangmulyo 02 Semarang on the concept of animal life cycle. Keywords: Picture and Picture Model, Lucky Wheel, Activity and Learning Outcomes. ABSTRAKPenelitian ini dilatarbelakangi oleh rendahnya aktivitas belajar yang mempengaruhi hasil belajar siswa dan akhirnya hasil belajar siswa tidak mencapai KKM. Penelitian ini bertujuan untuk mengetahui seberapa besar pengaruh model pembelajaran picture and picture berbantuan media permainan roda keberuntungan terhadap aktivitas dan hasil belajar siswa pada mata pelajaran IPA kelas IV SDN Sendangmulyo 02 Semarang. Bentuk penelitian ini adalah penelitian kuantitatif dengan desain Quasi Experimental Design dengan bentuk desain Non-equivalent Control Group Design. Teknik sampling yang digunakan yaitu Nonprobability. Populasi penelitian ini adalah seluruh siswa kelas IV SDN Sendangmulyo 02 Semarang. Teknik pengumpulan data dalam  penelitian ini menggunakan dokumentasi, observasi, tes dan wawancara. Teknik analisis data terdiri dari uji normalitas, uji homogenitas, uji ketuntasan belajar dan uji t. Analisis data menggunakan uji t diperoleh hasil 4,452 lebih besar dari t tabel yaitu 1,990. Hasil penelitian menunjukkan bahwa penggunaan model pembelajaran picture and picture berbantuan media permainan roda keberuntungan berpengaruh terhadap aktivitas dan hasil belajar siswa kelas IV SDN Sendangmulyo 02 Semarang pada konsep daur hidup hewan.Kata kunci: Model Picture and Picture, Roda keberuntungan, Aktivitas dan Hasil Belajar.


MADRASAH ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 15-25
Author(s):  
Wijianti Wijianti ◽  
Wahidmurni Wahidmurni

The purpose of this research is to develop a Student Learning Worksheet (LKS) based on discovery learning to improve the understanding of the concept of animal life cycle material in Grade IV Madrasah Ibtidiyah students, including: describing product specifications, explaining the level of product attractiveness, and explaining the difference in the level of understanding of student concepts from those learn by using LKS and not using LKS. The subjects of the study were the fourth grade students of MI Sunan Ampel Pakis. The research procedure follows five stages of the ten stages developed by Borg and Gall in the framework of developing modules of the research and development method. The five stages are research and information collecting, planning, developing preliminary forms of product, preliminary field testing, and playing product revision. Logical feasibility analysis of media worksheets using validation of material experts, linguists, design experts and subject matter experts; the attractiveness of student worksheets was empirically analyzed using a closed questionnaire of student responses, and differences in the level of understanding were analyzed through the t test of the pre test results before using the media and the post test results after using the media in the experimental class and the control class. The results showed that the worksheets produced were feasible to use with the predicate of validation both in terms of design, language, and learning, as well as very good in terms of material; Student responses also show a very interesting predicate; the level of concept understanding of students who learn to use LKS is better than those who do not use LKS. This indicates that the worksheets developed can be used to be applied in the next research phase.


Author(s):  
Betty Ruth Jones ◽  
Steve Chi-Tang Pan

INTRODUCTION: Schistosomiasis has been described as “one of the most devastating diseases of mankind, second only to malaria in its deleterious effects on the social and economic development of populations in many warm areas of the world.” The disease is worldwide and is probably spreading faster and becoming more intense than the overall research efforts designed to provide the basis for countering it. Moreover, there are indications that the development of water resources and the demands for increasing cultivation and food in developing countries may prevent adequate control of the disease and thus the number of infections are increasing.Our knowledge of the basic biology of the parasites causing the disease is far from adequate. Such knowledge is essential if we are to develop a rational approach to the effective control of human schistosomiasis. The miracidium is the first infective stage in the complex life cycle of schistosomes. The future of the entire life cycle depends on the capacity and ability of this organism to locate and enter a suitable snail host for further development, Little is known about the nervous system of the miracidium of Schistosoma mansoni and of other trematodes. Studies indicate that miracidia contain a well developed and complex nervous system that may aid the larvae in locating and entering a susceptible snail host (Wilson, 1970; Brooker, 1972; Chernin, 1974; Pan, 1980; Mehlhorn, 1988; and Jones, 1987-1988).


Author(s):  
Randolph W. Taylor ◽  
Henrie Treadwell

The plasma membrane of the Slime Mold, Physarum polycephalum, process unique morphological distinctions at different stages of the life cycle. Investigations of the plasma membrane of P. polycephalum, particularly, the arrangements of the intramembranous particles has provided useful information concerning possible changes occurring in higher organisms. In this report Freeze-fracture-etched techniques were used to investigate 3 hours post-fusion of the macroplasmodia stage of the P. polycephalum plasma membrane.Microplasmodia of Physarum polycephalum (M3C), axenically maintained, were collected in mid-expotential growth phase by centrifugation. Aliquots of microplasmodia were spread in 3 cm circles with a wide mouth pipette onto sterile filter paper which was supported on a wire screen contained in a petri dish. The cells were starved for 2 hrs at 24°C. After starvation, the cells were feed semidefined medium supplemented with hemin and incubated at 24°C. Three hours after incubation, samples were collected randomly from the petri plates, placed in plancettes and frozen with a propane-nitrogen jet freezer.


2008 ◽  
Vol 11 (1) ◽  
pp. 9-11 ◽  
Author(s):  
Carolyn S. Potts ◽  
Sarah M. Ginsberg

Abstract In recent years, colleges and universities across the country have been called upon to increase the quality of education provided and to improve student retention rates. In response to this challenge, many faculty are exploring alternatives to the traditional “lecture-centered” approach of higher education in an attempt to increase student learning and satisfaction. Collaborative learning is one method of teaching, which has been demonstrated to improve student learning outcomes.


2010 ◽  
Vol 13 (2) ◽  
pp. 40-48 ◽  
Author(s):  
John Wm. Folkins

A class of 58 students in Introduction to Communication Disorders was divided into eight teams of approximately seven students each. The teams sat together all semester and participated in at least one team activity (team discussions, in-class written assignments, and team quizzes) in every class period. Teams also were used for taking roll and reviewing for examinations. There was no decline in student evaluation of the overall effectiveness of the course or in examination scores when compared to when this course was taught with half the number of students and no teams. Students evaluated the team experience highly and appeared to enjoy competition among teams. Using teams was successful in creating experiences that foster student learning as embodied in Chickering and Gameson’s principles of good practice.


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