Prescribed active learning increases performance in introductory biology

We tested five course designs that varied in the structure of daily and weekly active-learning exercises in an attempt to lower the traditionally high failure rate in a gateway course for biology majors. Students were given daily multiple-choice questions and answered with electronic response devices (clickers) or cards. Card responses were ungraded; clicker responses were graded for right/wrong answers or participation. Weekly practice exams were done as an individual or as part of a study group. Compared with previous versions of the same course taught by the same instructor, students in the new course designs performed better: There were significantly lower failure rates, higher total exam points, and higher scores on an identical midterm. Attendance was higher in the clicker versus cards section; attendance and course grade were positively correlated. Students did better on clicker questions if they were graded for right/wrong answers versus participation, although this improvement did not translate into increased scores on exams. In this course, achievement increases when students get regular practice via prescribed (graded) active-learning exercises.     

自主学习在生物课堂中的尝试

旧的教育模式使学生有较扎实的基础知识,却缺少应有的实践能力;有理想的基本技能,却缺少创造的欲望;有较强的理解能力,却没有情感体验和自信;有勤奋刻苦的精神,却没有正确的人生观和价值观,这种教育培养的是“解题机器”,学生的先天禀赋被淹没,学生的个性张扬被压制,许多优等生到高中或大学后,“发展性”明显不足,可见实施素质教育就必须优化教学过程,构建以培养人的素质为目的的自主性学习模式,是中学生物教学的一个必然趋势,也符合以学生发展为本的教育理念。     

Assessment of the effectiveness of the studio format in introductory undergraduate biology

Kansas State University converted its introductory biology course, previously taught as an audio-tutorial (A-T), to a studio format in 1997. We share with others information about the process involved and present assessment data for the studio format course that address 1) student exam performance in A-T and studio; 2) student course grades in A-T and studio; 3) student and instructor perceptions and attitudes for A-T and studio; 4) student performance in subsequent biology courses for A-T and studio; and 5) gains in student learning for the studio course and other traditional lecture/lab courses. Collectively, these measures demonstrate that the studio format is as effective as or more effective (for some measures) than the A-T approach and traditional approaches in providing an effective learning environment. We discuss the issues involved in comparing course formats.     

Increased learning observed in redesigned introductory biology course that employed web-enhanced, interactive pedagogy

Our Introduction to Biology course (BIOL 1010) changed in 2004 from a standard instructor-centered, lecture-homework-exam format to a student-centered format that used Web-enhanced, interactive pedagogy. To measure and compare conceptual learning gains in the traditional course in fall 2003 with a section of the interactive course in fall 2004, we created concept inventories for both evolution and ecology. Both classes were taught by the same instructor who had taught BIOL 1010 since 1976, and each had a similar student composition with comparable biological knowledge. A significant increase in learning gain was observed with the Web-enhanced, interactive pedagogy in evolution (traditional, 0.10; interactive, 0.19; p = 0.024) and ecology (traditional, -0.05; interactive, 0.14; p = 0.000009) when assessment was made unannounced and for no credit in the last week of classes. These results strengthen the case for augmenting or replacing instructor-centered teaching with Web-enhanced, interactive, student-centered teaching. When assessment was made using the final exam in the interactive course, for credit and after studying, significantly greater learning gains were made in evolution (95%, 0.37, p = 0.0001) and ecology (143%, 0.34, p = 0.000003) when compared with learning gains measured without credit or study in the last week of classes.     

Active learning not associated with student learning in a random sample of college biology courses

Previous research has suggested that adding active learning to traditional college science lectures substantially improves student learning. However, this research predominantly studied courses taught by science education researchers, who are likely to have exceptional teaching expertise. The present study investigated introductory biology courses randomly selected from a list of prominent colleges and universities to include instructors representing a broader population. We examined the relationship between active learning and student learning in the subject area of natural selection. We found no association between student learning gains and the use of active-learning instruction. Although active learning has the potential to substantially improve student learning, this research suggests that active learning, as used by typical college biology instructors, is not associated with greater learning gains. We contend that most instructors lack the rich and nuanced understanding of teaching and learning that science education researchers have developed. Therefore, active learning as designed and implemented by typical college biology instructors may superficially resemble active learning used by education researchers, but lacks the constructivist elements necessary for improving learning.     

Collegiality in the classroom: The use of Peer Learning Assistants in cooperative learning in introductory biology

Experienced undergraduate students served as Peer Learning Assistants (PLAs) to facilitate group process and dynamics in cooperative learning groups. The use of this model in large classes (150 students) resulted in statistically significant improvements in group performance and satisfaction with the group experience. PLAs defused conflict in groups which were, by their cognitively diverse nature, conflict-prone. Student attitudes about their PLAs and PLA attitudes about the experience were positive. Faculty productivity was substantially enhanced because group dynamics problems rarely landed in the faculty office.James E. Groccia is the Director of the Program for Excellence in Teaching at the University of Missouri, Columbia. He received the Ed.D. in Educational and Counseling Psychology from the University of Tennessee, Knoxville, the Ms.Ed. in Social Science Education from Hofstra University, and the B.A. in Psychology from Hartwick College. Judith E. Miller is Associate Professor of Biology and Biotechnology at Worcester Polytechnic Institute, Worcester, Massachusetts. She received the Ph.D. in Microbiology from Case Western Reserve University and the B.S. in Biological Sciences from Cornell University. Her special interests include the restructuring of technical courses to include cooperative learning and educational productivity.     

Learn before lecture: A strategy that improves learning outcomes in a large introductory biology class

Actively engaging students in lecture has been shown to increase learning gains. To create time for active learning without displacing content we used two strategies for introducing material before class in a large introductory biology course. Four to five slides from 2007/8 were removed from each of three lectures in 2009 and the information introduced in preclass worksheets or narrated PowerPoint videos. In class, time created by shifting lecture material to learn before lecture (LBL) assignments was used to engage students in application of their new knowledge. Learning was evaluated by comparing student performance in 2009 versus 2007/8 on LBL-related question pairs, matched by level and format. The percentage of students who correctly answered five of six LBL-related exam questions was significantly higher (p < 0.001) in 2009 versus 2007/8. The mean increase in performance was 21% across the six LBL-related questions compared with <3% on all non-LBL exam questions. The worksheet and video LBL formats were equally effective based on a cross-over experimental design. These results demonstrate that LBLs combined with interactive exercises can be implemented incrementally and result in significant increases in learning gains in large introductory biology classes.     

Increased course structure improves performance in introductory biology

We tested the hypothesis that highly structured course designs, which implement reading quizzes and/or extensive in-class active-learning activities and weekly practice exams, can lower failure rates in an introductory biology course for majors, compared with low-structure course designs that are based on lecturing and a few high-risk assessments. We controlled for 1) instructor effects by analyzing data from quarters when the same instructor taught the course, 2) exam equivalence with new assessments called the Weighted Bloom's Index and Predicted Exam Score, and 3) student equivalence using a regression-based Predicted Grade. We also tested the hypothesis that points from reading quizzes, clicker questions, and other "practice" assessments in highly structured courses inflate grades and confound comparisons with low-structure course designs. We found no evidence that points from active-learning exercises inflate grades or reduce the impact of exams on final grades. When we controlled for variation in student ability, failure rates were lower in a moderately structured course design and were dramatically lower in a highly structured course design. This result supports the hypothesis that active-learning exercises can make students more skilled learners and help bridge the gap between poorly prepared students and their better-prepared peers.     

Attitudes of introductory college biology students toward evolution

Introductory college biology students were surveyed to investigate their attitudes toward evolution. Thurstone's Scale No. 30, Form A, Attitudes Toward Evolution was used to survey the sample. Results indicate that the majority of introductory biology students believe in the theory of evolution. Two demographic variables, sex and influence of the church, produced a significant correlation with the attitude scores. There were significant interactions between sex and influence of high school biology teacher and between sex and major. Self rating by the individual students and attitude scores also produced a significant correlation. Construct validity of the attitude scale was supported by the significant correlation between student self rating and scale scores. ANOVA produced a F value significant at the 0.01 probability level, and Spearman's correlation coefficient between the two measures was 0.73. Although the Thurstone Scale No. 30, Form A, is over 45 years old, the results of this study suggest that it is a reliable instrument for use today with modifications in item construction, scaling or adaptation to other scoring methods.     

A quasi-experimental study comparing learning gains associated with serious educational gameplay and hands-on science in elementary classrooms

Serious educational gameplay continues to gain traction in K-12 educational settings, as access to novel technologies increases. Increased access to computers and other devices has shifted the landscape of the classroom, increasing students' screen-time, as technology infused lessons replace other learning experiences. Amid this context, our research team created a serious educational game (SEG) designed for elementary science learners. Previous studies have linked serious gameplay to learning gains and changes in attitudes, yet the rigor of the studies often underwhelms, as the studies lack an adequate sample size, detailed student data, or quality comparison groups. These limitations are compounded in the study of science learning in elementary schools, due to structural difficulties and student variability that impede the implementation of this type of experimentation. This research attends to this knowledge gap, as our team conducted two quasi-experimental studies to explore the learning gains associated with Virtual Vet, a SEG designed to address the fundamental science concepts associated with the human body systems and the subsequent effect of diabetes and obesity related illnesses on the given body systems. In Study 1, students (n = 232) were randomly assigned to play Virtual Vet or participate in guided inquiry lessons that addressed the same objectives. Our study found that students in the game condition outperformed the non-game condition. Based on this finding, we designed Study 2 to compare learning outcomes associated with two conditions: students play only Virtual Vet or students play Virtual Vet and they participate in the guided inquiry activities, which doubled the instructional time for this group. Students (n = 166) were assigned to one of the conditions and we found no significant increase in learning gains for the students who participated in both activities. These results indicate that well-designed SEGs powerfully facilitate and support science learning in elementary settings.     

初中生物学教学培养学生自主创新学习初探

根据初中学生的身心特点和人思维发展的不可逆性规律,教师通过创设具挑战性的生物学问题,提供给自主学习和自主创新的空间,营造民主、和谐、合作的教学氛围,激发、培养学生多方面的思维,开发学生智力的多样化.有计划、有步骤地训练他们的自主创新思维,培养他们的创新精神,提高他们的创新能力.     

合作探究学习的实践与思考

在新一轮课程改革中，我们遵循课改理念，以新型师生关系为基础，以师生复合互动为途径，通过师生合作开展探究性学习，探索出了一些生物学课堂的合作探究学习方式。合作探究学习以问题为探究学习的切入点，以小组活动为探究学习的基本形式。通过鼓励学生自主开展知识建构，激发了学生学习的；积极性和创造性，培养了学生探索精神和协作精神，收到了满意的教学效果。现将我们的做法介绍如下：     

A disaggregated investigation of learning functions in introductory economics

Few evaluations of specific curriculum decisions or teaching methods have investigated their potential impact on the learning performance of students with different characteristics. This paper attempts to address that void by estimating learning functions for different subgroups of students.To investigate the potential variations in student learning processes, a sample of freshmen economic students from a state university is disaggregated by the students' gender, previous knowledge of economics, attitudes toward economics and innate abilities as measured by ACT. ACT English and ACT Mathematics. Differences in the regression coefficients of the segmented samples are then tested using the Chow Test.     

浅析生物学高考遗传系谱题

通过比较近10年全国及上海市高考题目，遗传系谱的考题几乎成为“保留节目”。这种类型题目有着较好的区分度，能充分体现高考作为选拔性考试功能的特点，因此命题专家乐此不疲的“挖空心思”、巧妙的加以设计也就在情理之中。虽然遗传系谱这种类型题有着较高的解题要求，但细细研究，不难发现它所经历的变迁及其内在的规律，下面就高考遗传系谱题的规律及应对技巧谈一下自己的拙见。     

School quality and learning gains in rural Guatemala

I use unusually detailed data on schools, teachers and classrooms to explain student achievement growth in rural Guatemala. Several variables that have received little attention in previous studies – including the number of school days, teacher content knowledge and pedagogical methods – are robust predictors of achievement. A series of decompositions by student ethnicity and type of school shed some additional light on important questions in the Guatemalan context, and beyond. The large indigenous test score gap is not explained by differences in an extensive list of observable features of schools. The large effect for community characteristics suggests peer group effects or more general institutional differences related to services or labor markets. PRONADE community schools are associated with moderate gains vis-à-vis public schools in areas related to utilization of capacity, such as days worked. But these gains are largely offset by lower teacher capacity, which highlights the challenge of improving school quality in poor, rural areas.