Funding for this research was provided by:
Division of Elementary, Secondary, and Informal Education (1543136)
First Online: 22 November 2019
Compliance with Ethical Standards
: The authors individually declare that each has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards as articulated in the 1979 Belmont Report and as reviewed by the Institutional Review Board at Education Development Center, Inc. (Registration No. 00000865). This research was determined to be exempt by the IRB under Section 101(b), paragraph 1.
: Informed consent was obtained from all individual participants included in the study. Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.
: Any opinions, findings, conclusions, or recommendations reported here are those of the authors and do not necessarily reflect the views of the National Science Foundation.