Message-ID: <449973767.2479.1607017183515.JavaMail.confluence@external-wiki.terc.edu> Subject: Exported From Confluence MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_Part_2478_701435704.1607017183514" ------=_Part_2478_701435704.1607017183514 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Content-Location: file:///C:/exported.html Findings

# Findings

## Initial findings

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This page will provide information about findings from the Evalu= ating DMI study. As of summer, 2012, we have begun to analyze data= from our first year of study:

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#### New DMI Classroom V= ideo Assessment (CVA)

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We worked with Advisor Nicole Kersting (U AZ) to create a new measure of= teacher knowledge grounded in classroom practice. The DMI Number and O= perations CVA uses 3-5 minute classroom video clips as stimuli for tea= cher reflection on how teachers and students interact around DMI-related co= ntent (counting and operations using whole numbers, decimals and fractions)= . Responses are scored using four 3-point rubrics (Mathematical Content; St= udent Thinking; Suggestions for Improvement; and Depth of Interpretation) w= ith inter-rater reliability between 0.85 and 0.90. We piloted 18 clips with= 21 teachers, then chose 11 based on psychometric properties and differenti= ation between more or less sophisticated responses.

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#### DMI-Based Knowledge Gains on the Learning Math for Teaching (LM= T) MKT Measure

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Teachers in both Treatment and Comparison groups took the Learning Math = for Teaching (LMT) assessment of Mathematical Knowledge for Teaching (MKT) = both before and after the DMI seminars. Initial results show a statisticall= y significant difference in LMT gain scores for teachers in DMI seminars (0= .43, SE=3D0.11) compared with the control group (=E2=80=930.08, SE=3D0.15);= F(1, 39)=3D14.70, p=3D0.001.

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#### Other measures

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We are currently coding results from the CVA and an open-ended teacher k= nowledge measure, as well as classroom videotapes, student assessments, and= professional development logs.

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