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Measuring scientific classroom discourse: The DiISC Version 2.0's validity and use in observing secondary science lessons.

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Title: Measuring scientific classroom discourse: The DiISC Version 2.0's validity and use in observing secondary science lessons.
Authors: Lewis, Elizabeth1 (AUTHOR) elewis3@unl.edu, Lucas, Lyrica1 (AUTHOR), Helding, Brandon1 (AUTHOR), Tankersley, Amy1 (AUTHOR), Hasseler, Elizabeth1 (AUTHOR), Rivero, Ana2 (AUTHOR), Baker, Dale3 (AUTHOR)
Source: School Science & Mathematics. Apr2026, Vol. 126 Issue 2, p143-158. 16p.
Subject Terms: *Observation (Educational method), *Inquiry method (Teaching), *Scientific communication, *Multilingual education, *Educational evaluation, *Academic language, *Science education, Social constructivism
Abstract: To continue to support long‐term, ongoing science curriculum and instruction reform efforts in the United States, there is a significant need to be able to reliably measure teachers' discourse‐rich, inquiry‐based instruction. In this external validation study, we present the Discourse in Inquiry Science Classrooms Version 2.0 (DiISC 2.0) as a valuable observational instrument for researchers to investigate multiple aspects of science teachers' lessons. The DiISC 2.0 is grounded in a researchbased conceptual framework of a scientific classroom discourse community, focused on fundamental socioconstructivist characteristics of lessons, including scientific inquiry, oral and written discourse, and academic language development. We collected and analyzed new data from 807 science lessons to develop and expand the instrument's original validity argument beyond the associated professional development program for broader use. We determined the DiISC's factor structure and examined its correlation with the Electronic Quality of Inquiry Protocol. Finally, some items that did not represent DiISC constructs were removed. Thus, the DiISC 2.0 instrument can be used to measure students' opportunities to learn science and provide feedback to teachers on their progress toward building an inclusive scientific classroom discourse community for all students, in particular, historically marginalized groups and multilingual learners. [ABSTRACT FROM AUTHOR]
Copyright of School Science & Mathematics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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  Data: <searchLink fieldCode="JN" term="%22School+Science+%26+Mathematics%22">School Science & Mathematics</searchLink>. Apr2026, Vol. 126 Issue 2, p143-158. 16p.
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  Data: To continue to support long‐term, ongoing science curriculum and instruction reform efforts in the United States, there is a significant need to be able to reliably measure teachers' discourse‐rich, inquiry‐based instruction. In this external validation study, we present the Discourse in Inquiry Science Classrooms Version 2.0 (DiISC 2.0) as a valuable observational instrument for researchers to investigate multiple aspects of science teachers' lessons. The DiISC 2.0 is grounded in a researchbased conceptual framework of a scientific classroom discourse community, focused on fundamental socioconstructivist characteristics of lessons, including scientific inquiry, oral and written discourse, and academic language development. We collected and analyzed new data from 807 science lessons to develop and expand the instrument's original validity argument beyond the associated professional development program for broader use. We determined the DiISC's factor structure and examined its correlation with the Electronic Quality of Inquiry Protocol. Finally, some items that did not represent DiISC constructs were removed. Thus, the DiISC 2.0 instrument can be used to measure students' opportunities to learn science and provide feedback to teachers on their progress toward building an inclusive scientific classroom discourse community for all students, in particular, historically marginalized groups and multilingual learners. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of School Science & Mathematics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/ssm.18325
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              Text: Apr2026
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              Y: 2026
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