对美国新一代《科学教育标准》的前瞻性分析——基于2011年美国《科学教育的框架》和1996年《国家科学教育标准》的对比

美国于2011年7月颁布的《k-12年级科学教育的框架:实践、交叉概念、以及核心观念》(以下简称《框架》)是其新一代科学教育标准开发的基础文件,本文介绍了其研制背景。并通过将《框架》的主体内容与美国1996年的《国家科学教育标准》的"科学内容标准"(以下简称《前标准》)进行对比,抽提出《框架》的特点。最后根据上述分析得出该文件对我国研制课程标准的启示。     

美国《新一代科学教育标准》述评

长期以来,美国都受到其基础教育质量不高,中小学学生科学素养不足的困扰。近年来美国出台了一系列关于科学教育的国家标准。1996年美国推出了《国家科学教育标准》（以下简称《标准》）。2010年,美国又颁布了《K-12科学教育框架》（以下简称《框架》）。在此基础上,2013年4月美国又颁布了《新一代科学教育标准》（以下简称《新标准》）。本文在介绍《新标准》提出的背景的基础上,着重介绍《新标准》提出的一些新的观念,并在正视中美客观差异基础上,针对我国国情,提出提高我国科学教育水平的一些建议。     

Planning Instruction to Meet the Intent of the Next Generation Science Standards

The National Research Council’s Framework for K-12 Science Education and the Next Generation Science Standards (NGSS Lead States in Next Generation Science Standards: For states, by states. The National Academies Press, Washington, 2013) move teaching away from covering many isolated facts to a focus on a smaller number of disciplinary core ideas (DCIs) and crosscutting concepts that can be used to explain phenomena and solve problems by engaging in science and engineering practices. The NGSS present standards as knowledge-in-use by expressing them as performance expectations (PEs) that integrate all three dimensions from the Framework for K-12 Science Education. This integration of core ideas, practices, and crosscutting concepts is referred to as three-dimensional learning (NRC in Division of Behavioral and Social Sciences and Education. The National Academies Press, Washington, 2014). PEs state what students can be assessed on at the end of grade level for K-5 and at the end of grade band for 6–8 and 9–12. PEs do not specify how instruction should be developed nor do they serve as objectives for individual lessons. To support students in developing proficiency in the PEs, the elements of the DCIs will need to be blended with various practices and crosscutting concepts. In this paper, we examine how to design instruction to support students in meeting a cluster or “bundle” of PEs and how to blend the three dimensions to develop lesson level PEs that can be used for guiding instruction. We provide a ten-step process and an example of that process that teachers and curriculum designers can use to design lessons that meet the intent of the Next Generation of Science Standards.     

How the environment is positioned in the Next Generation Science Standards: a critical discourse analysis

The purpose of this paper is to describe how the environment and environmental issues are conceptualized and positioned in the Next Generation Science Standards (NGSS) to examine underlying assumptions about the environment. The NGSS are a recent set of science standards in the USA, organized and led by Achieve Inc., that propose science education goals based on the National Research Council report, A Framework for K-12 Science Education. Drawing from critical discourse analysis, we present a detailed textual analysis of the NGSS to identify the positioning of the environment with respect to humans and human activity. This analysis shows patterns in the ways that the environment is conceptualized and inscribed in the standards as an entity separate from people through both exclusion and ambiguity. We also discuss findings about how agency is more often ascribed to actions or activities rather than people and when solutions to environmental issues are included, the focus is on technoscientific solutions. Finally, we provide implications for considering scientific and environmental literacy, education for action, and the role of standards documents in shaping educational practice.     

The impact of engineering curriculum design principles on elementary students’ engineering and science learning

The Framework for K-12 Science Education and the Next Generation Science Standards propose that students learn core ideas and practices related to engineering as well as science. To do so, students will need high-quality curricular materials designed to meet these goals. We report an efficacy study of an elementary engineering curriculum, Engineering is Elementary (EiE) that includes a set of hypothesized critical components designed to encourage student engagement in practices, connect engineering and science learning, and reach diverse students. To measure the impact of the curriculum, we conducted a cluster randomized controlled trial in 604 classrooms in 152 schools in three states. Schools were randomly assigned to either the treatment curriculum or to a comparison curriculum that addressed the same learning goals but did not include several critical components. Results show that students who used the treatment curriculum (EiE) regardless of demographic characteristics outperformed students in the comparison group on outcome measures of both engineering and science content learning. The results show that curriculum design affects student-learning outcomes.     

学习进阶:关注学生认知发展和生活经验

2012年,美国正式发布了《K-12科学教育框架:实践、通用概念及核心概念》最终版。作为全美新一代科学教育标准的指导性文件,该框架使用了学习进阶连贯地表征出学生在各学段应达成的学习目标。学习进阶的提出与定义、组成要素、理论基础及其构建与呈现方式决定了其对学生认知发展和已有生活经验的关注,使其成为教育研究与教学紧密结合的桥梁,也是设计与实现少而精、连贯一致的中小学科学课程的必然需求。当前,国际科学教育领域已由学习进阶的研究与设计阶段迈向应用与实践层面,而我国对学习进阶的认识与研究仍处于起步阶段,亟须在中小学科学教育领域展开对学习进阶的深入研究。     

NGSS,disposability, and the ambivalence of science in/under neoliberalism

This paper explores the ambivalence of the Next Generation Science Standards (NGSS) and its Framework towards neoliberal governance. The paper examines the ways that the NGSS serves as a mechanism within neoliberal governance: in its production of disposable populations through testing and through the infusion of engineering throughout the NGSS to resolve social problems through technical fixes. However, the NGSS, like earlier standards, is reactionary to forces diminishing the power of institutional science (e.g., the AAAS) including neoliberal prioritizing market value over evidence. The NGSS explicitly takes on neoliberal junk science such as the anti-global-warming Heartland Institute.     

‘Models of’ versus ‘Models for’

The inclusion of the practice of “developing and using models” in the Framework for K-12 Science Education and in the Next Generation Science Standards provides an opportunity for educators to examine the role this practice plays in science and how it can be leveraged in a science classroom. Drawing on conceptions of models in the philosophy of science, we bring forward an agent-based account of models and discuss the implications of this view for enacting modeling in science classrooms. Models, according to this account, can only be understood with respect to the aims and intentions of a cognitive agent (models for), not solely in terms of how they represent phenomena in the world (models of). We present this contrast as a heuristic—models of versus models for—that can be used to help educators notice and interpret how models are positioned in standards, curriculum, and classrooms.     

Model‐based reasoning about energy: A fourth‐grade case study

We report a case study of model‐based reasoning in which a small group of fourth‐grade students analyzes the energy flow when a solar panel is used to power an electric motor that spins a propeller. In developing their explanation of energy flow, the students draw on a general model of energy developed collectively by their class in the course of an experimental classroom curriculum led by a trained teacher. They also construct a model‐based representation of the specific system under study. Their investigation and reasoning process exhibit all the features of authentic scientific model‐based inquiry, including the revision of their models to incorporate new information. In the course of their work the students recruit and seamlessly integrate nearly all of the practices of science designated in the Next Generation Science Standards. This case study provides an example of what modeling‐based teaching and learning can look like in an elementary school classroom. It also suggests that the study of energy offers a particularly promising context for developing students' use of science practices, especially the practice of developing and using models.     

Validation of an Instrument for Measuring Students’ Understanding of Interdisciplinary Science in Grades 4-8 over Multiple Semesters: a Rasch Measurement Study

So far, not enough effort has been invested in developing reliable, valid, and engaging assessments in school science, especially assessment of interdisciplinary science based on the new Next Generation Science Standards (NGSS). Furthermore, previous tools rely mostly on multiple-choice items and evaluation of student outcome is linked only to their raw scores in standardized tests. In addition, educational research on student science achievement always limits in certain grade/subject according to application of raw scores. This study provides a way to design, validate, and further improve an instrument to assess student understanding in interdisciplinary science across grade and time. Meanwhile, student learning growth is investigated. The data are collected from elementary/middle school student survey from an Interdisciplinary Science and Engineering Partnership (ISEP) in Northeastern part of the USA. The results show a generally good quality of instrument through various aspects of empirical evidence, such as dimensionality, model-data-fit, and validity. Finally, student learning growth in understanding interdisciplinary science shows a sharp increase between elementary and middle school. The study sheds light on developing more reliable and valid instruments in assessing student science understanding based on the new standards and it also provides suggestions of implementation in both educational research and practice.     

Towards a Philosophically Guided Schema for Studying Scientific Explanation in Science Education

Science & Education - Stemming from the realization of the importance of the role of explanation in the science classroom, the Next Generation Science Standards (NGSS Lead States 2013) call for...     

Using contrasting cases to improve self-assessment in physics learning

Self-assessment is essential to scientific literacy as stated by the National Research Council Committee on Conceptual Framework for the New K-12 Science Education Standards and has since been incorporated into the Next Generation Science Standards. However, little empirical evidence documents which instructional tools are beneficial in improving students’ self-assessment in science learning. As such, we conducted a classroom-based quasi-experiment to test whether contrasting case-based instructional supports improved 390 introductory high school physics students’ accuracy in self-assessment and academic performance when solving physics problems. We compared the effects of providing students with content knowledge and contrasting cases (contrasting good and poor solution) on students’ physics problem solving and their ability to self-assess, with the effects of either presenting them with content knowledge and good solutions or teaching only content knowledge. We found contrasting examples improved the accuracy of students’ self-assessments, promoted content learning, and enhanced the development of self-assessment strategies.     

Embedding Multiple Literacies into STEM Curricula

In fall 2012, an interdisciplinary team of science, English, and library faculty embedded reading, writing, and information literacy strategies in Science, Technology, Engineering, and Mathematics (STEM) curricula as a first step in improving student learning and retention in science courses and aligning them with the Next Generation Science and Common Core State Standards. The authors present their reading, writing, and information literacy contributions, explaining the importance of introducing these concepts and strategies into science courses.     

Inquiry-Based Science and Technology Enrichment Program for Middle School-Aged Female Students

This study investigates the effects of an intensive 1-week Inquiry-Based Science and Technology Enrichment Program (InSTEP) designed for middle school-aged female students. InSTEP uses a guided/open inquiry approach that is deepened and redefined as eight sciences and engineering practices in the Next Generation Science Standards, which aimed at increasing female students’ interest in science and science-related careers. This study examined the effectiveness of InSTEP on 123 female students’ pre-assessment and post-assessment changes in attitudes toward science and content knowledge of selected science concepts. An attitude survey, a science content test with multiple-choice questions, written assignments, and interviews to collect data were all used to measure students’ attitudes and content knowledge. A within-group, repeated measure design was conducted, and the results indicated that at the post-intervention level, InSTEP increased the participants’ positive attitudes toward science, science-related careers, and content knowledge of selected science concepts.     

Science Teachers’ Misconceptions in Science and Engineering Distinctions: Reflections on Modern Research Examples

The aim of this exploratory study was to learn about the misconceptions that may arise for elementary and high school science teachers in their reflections on science and engineering practice. Using readings and videos of real science and engineering work, teachers’ reflections were used to uncover the underpinnings of their understandings. This knowledge ultimately provides information about supporting professional development (PD) for science teachers’ knowledge of engineering. Six science teachers (two elementary and four high school teachers) participated in the study as part of an online PD experience. Cunningham and Carlsen’s (Journal of Science Teacher Education 25:197–210, 2014) relative emphases of science and engineering practices were used to frame the design of PD activities and the analyses of teachers’ views. Analyses suggest misconceptions within the eight practices of science and engineering from the US Next Generation Science Standards in four areas. These are that: (1) the nature of the practices in both science and engineering research is determined by the long-term implications of the research regardless of the nature of the immediate work, (2) engineering and science are hierarchical, (3) creativity is inappropriate, and (4) research outcomes cannot be processes. We discuss the nature of these understandings among participants and the implications for engineering education PD for science teachers.     

Articulating the validity evidence for a science alternate assessment

Students with the most significant cognitive disabilities (SCD) are the 1% of the total student population who have a disability or multiple disabilities that significantly impact intellectual functioning and adaptive behaviors and who require individualized instruction and substantial supports. Historically, these students have received little instruction in science and the science assessments they have participated in have not included age‐appropriate science content. Guided by a theory of action for a new assessment system, an eight‐state consortium developed multidimensional alternate content standards and alternate assessments in science for students in three grade bands (3–5, 6–8, 9–12) that are linked to the Next Generation Science Standards (NGSS Lead States, 2013 ) and A Framework for K‐12 Science Education (Framework; National Research Council, 2012 ). The great variability within the population of students with SCD necessitates variability in the assessment content, which creates inherent challenges in establishing technical quality. To address this issue, a primary feature of this assessment system is the use of hypothetical cognitive models to provide a structure for variability in assessed content. System features and subsequent validity studies were guided by a theory of action that explains how the proposed claims about score interpretation and use depend on specific assumptions about the assessment, as well as precursors to the assessment. This paper describes evidence for the main claim that test scores represent what students know and can do. We present validity evidence for the assumptions about the assessment and its precursors, related to this main claim. The assessment was administered to over 21,000 students in eight states in 2015–2016. We present selected evidence from system components, procedural evidence, and validity studies. We evaluate the validity argument and demonstrate how it supports the claim about score interpretation and use.     

Improving Conceptual Understanding and Representation Skills Through Excel-Based Modeling

The National Research Council framework for science education and the Next Generation Science Standards have developed a need for additional research and development of curricula that is both technologically model-based and includes engineering practices. This is especially the case for biology education. This paper describes a quasi-experimental design study to test the effectiveness of a model-based curriculum focused on the concepts of natural selection and population ecology that makes use of Excel modeling tools (Modeling Instruction in Biology with Excel, MBI-E). The curriculum revolves around the bio-engineering practice of controlling an invasive species. The study takes place in the Midwest within ten high schools teaching a regular-level introductory biology class. A post-test was designed that targeted a number of common misconceptions in both concept areas as well as representational usage. The results of a post-test demonstrate that the MBI-E students significantly outperformed the traditional classes in both natural selection and population ecology concepts, thus overcoming a number of misconceptions. In addition, implementing students made use of more multiple representations as well as demonstrating greater fascination for science.     

The Next Generation Science Standards: The Features and Challenges

Beginning in January of 2010, the Carnegie Corporation of New York funded a two-step process to develop a new set of state developed science standards intended to prepare students for college and career readiness in science. These new internationally benchmarked science standards, the Next Generation Science Standards (NGSS) were completed in April of 2013. From his perspective as the coordinator of the development of the NGSS, the author discusses the background regarding the development, key features and some of the challenges ahead in implementing the NGSS.     

Using Technology-Enhanced Inquiry-Based Instruction to Foster the Development of Elementary Students’ Views on the Nature of Science

The Next Generation Science Standards support understanding of the nature of science as it is practiced and experienced in the real world through interconnected concepts to be imbedded within scientific practices and crosscutting concepts. This study explored how fourth and fifth grade elementary students’ views of nature of science change when they engage in a technology-enhanced, scientific inquiry-oriented curriculum that takes place across formal and informal settings. Results suggest that student engagement in technology-enhanced inquiry activities that occur in informal and formal settings when supported through explicit instruction focused on metacognitive and social knowledge construction can improve elementary students’ understanding of nature of science.