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First Online: 5 July 2019

Compliance with Ethical Standards

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: Authors declare that they have no conflict of interest.

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

: Informed consent was obtained from all teachers who participated in the study. Consistent with the approved JMU IRB protocol for consent procedures, a letter was sent home to caregivers describing the purpose and procedures of the study and offering an opportunity to opt out if they did not want their child to participate. The letter was also translated into Spanish. IRB submission materials as well as consents are available for review. In addition, a classroom teacher was required to make a follow-up personal contact to confirm that the parent had reviewed the letter and agreed to the participation of the child. As appropriate, an interpreter assisted the teacher in this personal communication.