The AP Science Impact Study, which is funded by the National Science Foundation, seeks to understand the impact of Advanced Placement Biology and Chemistry classes on the high school students who take them. It examines the effects of the updated inquiry-based curriculum on students’ confidence in scientific inquiry skills and their post-high school plans, including college type, selectivity, and major. This study has policy implications for science curriculum and the next generation STEM workforce.
Study Motivation
AP Science & Inquiry-Based Learning
Advanced Placement courses are designed to prepare high school students for the rigor of college coursework. The curriculum was revised by The College Board in 2012 and 2013 to better develop students’ ability to conduct scientific inquiry, emphasizing critical thinking over factual recall. The current AP classes are designed to give students confidence in their scientific inquiry skills, hopefully leading them on to further scientific study.
STEM & Policy Implications
Strengthening our teaching and learning of science, engineering, and quantitative reasoning is important for the workforce readiness of students, the growth of the U.S. economy, and our ability to develop innovative solutions to increasingly complex policy problems. This study will help guide policymakers and funders to implement effective, large-scale educational policy and funding decisions and help guide educators in advising individual students and prioritizing particular classes and curriculums.
Study Design
Experimental Design
While non-experimental studies have shown large, positive effects of advanced high school courses, we seek to fill in the gaps by using an experimental design to control for other variables. Most educational studies are observational in nature and do not involve a control and treatment group that can be compared with one another. With a randomized experimental design, we can control for extraneous variables and make greater inferences about causation instead of just correlation.
Hypothesis
The central hypothesis of our proposed research is that taking an inquiry-based AP® Biology or Chemistry course will cause students to be more interested and competent in scientific inquiry, more likely to enroll in and complete college, and more likely to pursue and persist in STEM majors. We further expect that students with less prior preparation will have more to gain from the inquiry-based AP® course and, thus, receive greater academic benefits than students with more prior preparation. Finally, we expect larger effects in classrooms where the curriculum is implemented with a high degree of fidelity.
Project Components
The AP Science Impact study involves several different components to analyze our hypothesis, including the newly created scientific inquiry instrument, student surveys, teacher and administrator surveys and in-person interviews, classroom observations, and administrative student data. The project is funded by the National Science Foundation, partners with researchers at George Washington University, Equal Measure, and other institutions, and is done in collaboration with The College Board.
Papers and Takeaways for Practice
Conger, D, Long, MC, McGhee Jr., R. “Advanced Placement and Initial College Enrollment: Evidence from an Experiment.” Forthcoming in Education Finance and Policy
To evaluate how Advanced Placement courses affect college-going, we randomly assigned the offer of enrollment into an AP science course to over 1,800 students in 23 schools that had not previously offered the course.
- We find no AP course effects on students’ college entrance exam scores (SAT/ACT).
- As expected, AP course-takers are substantially more likely to take the AP exam than their control group counterparts. At the same time, treatment group students opt out of the exam at very high rates and most do not earn a passing score on the AP exam.
- Though less precisely estimated, the results also suggest that taking the AP course increases students’ aspirations to attend higher-quality colleges but does not lead to enrollment in such institutions.
Conger, D, Kennedy, A, Long, MC, McGhee Jr., R. “Effects of Advanced Placement Science Courses on Skill, Confidence, and Interest in Science.” The Journal of Human Resources, 56, 93-124, 2021.
Compared to the control group, AP course-takers, on average:
- Scored slightly higher on a science assessment and expressed more interest in pursuing a STEM major in college: Overall, the authors find some evidence that AP classes increases students’ skill in science. Indeed, both students and teachers report that AP courses are more challenging that non-AP science courses. On an end-of-year assessment designed by the researcher team to measure scientific inquiry skills, AP science students scored slightly higher. However, the difference between the two groups was not statistically significant. The assessment measured students’ skill in data analysis, scientific explanation and scientific argument, rather than specific knowledge in Biology or Chemistry. Students in both the AP course and control group were very likely to say they were interested in a STEM degree, with the AP course takers being somewhat more likely on average, though the difference between the two groups was not statistically significant. Sixty-two percent of the control group and 71 percent of AP course takers said they are interested in a STEM degree should they enroll in college.
- Expressed lower confidence in their ability to succeed in college science: Overall, those wishing to take the AP science course had very high confidence in their ability to succeed in a college science course. AP course-takers however, were slightly less likely than those in the control group to be at least somewhat confident in their ability succeed in a college science course (82 percent vs 92 percent of the control group).
- Experienced higher levels of stress: Taking AP science has a strong negative effects on stress levels of students; 29 percent of AP students reported that their most recent science class had negative impacts on their stress levels compared to 12 percent of those in the control group.
- Had worse grades: On average, students who take an AP science course earn slightly lower grades in science (-0.3 grade points) and slightly lower grades in their other courses (-0.18 grade points). While institutions tend to upweight AP grades due to their relative academic difficulty, the authors find that the weighting should be greater than what is typically done. They find that applying a weight of 1.5 (instead of 0.5 or 1, as many institutions do) would be needed to fully adjust for the effect of taking an AP science course on a students overall GPA.
Long, MC, Conger, D, McGhee Jr., R. “Life on the Frontier of AP Expansion: Can Schools in Less-Resourced Communities Successfully Implement AP Science Courses?” Educational Researcher 48(6), 356 –368, 2019.
This paper evaluates the implementation of AP Biology and Chemistry courses across 23 schools in 11 school districts across the nation. The study revealed several impediments in the implementation process, of which teachers and administrators wishing to pursue the introduction of such courses may find useful:
- While teachers tended to welcome the addition of the AP classes and express excitement to teach the courses, many indicated having difficulty finding the time to prepare class content and desired more support from the school for developing the curriculum. The factors most associated with difficulty preparing class included not having a master’s degree, not actively engaging the class in discussion and debate, and dissimilarity between instruction method and AP science approach.
- Despite all students having met the pre-requisites for the offered courses, teachers reported a large variation in student preparedness at the onset of the class, hindering the speed at which the content could be taught. Teachers also reported that students were unprepared for the self-taught “inquiry-based” learning of the courses. To overcome these obstacles, some teachers reporting using scaffolding techniques to allow students to gradually shed the need for outside assistance. Others assigned content typically covered in class as homework to allow for enough time to cover all of the course material.
Seeratan, K, McElhaney, KW, Mislevy, J, McGhee Jr., R, Conger, D, Long, MC. “Measuring Students’ Ability to Engage in Scientific Inquiry: A New Instrument to Assess Data Analysis, Explanation, and Argumentation.” Educational Assessment, 25(2), 112-135, 2020.
The science education community lacks assessments that reliably and validly measure knowledge, skills, and abilities that are needed to support engagement in authentic science inquiry. In this paper, we describe the conceptualization, design, development, and testing of an instrument focused on measuring students’ proficiency at the intersection of data analysis, scientific explanation, and scientific argument.
Researchers and practitioners may choose to use the validated instrument as is, if it fits their particular need or may choose to use it as a starting point for developing similar instruments relevant to their own research contexts. The strengths of the instrument lie in its relatively brief time for administration and the minimal amount of science disciplinary knowledge required for students to answer the questions. Our work has value in modeling how to design assessments that align to the National Research Council Framework, adhere to the recommendations of the measurement community, and forefront the assessment of science practices while still integrating them with disciplinary knowledge following contemporary science education frameworks. Our work also informs the design of Next Generation Science Standards-aligned assessments.