New Hampshire 2020 Skip-Year SGP
Analyses
Damian Betebenner
National Center for the Improvement of
Educational Assessment
New Hampshire Assessment and Accountability
Technical Advisory Committee (TAC)
June 29, 2020
COVID-19 Pandemic
• Oh what a difference a couple of months make.
• Most Spring 2020 tests have been cancelled:
– State assessments in ELA/Math have been cancelled
– Many ELP assessments (WIDA/ACCESS) were completed (e.g., in New Hampshire)
• States, including New Hampshire, have been given assessment and
accountability waivers by ED for 2020.
• Because student academic growth as measured by state summative
assessments utilizes prior assessment data in its calculation, the impacts of the
2020 pandemic will have ripple effects in 2021.
• My colleague Adam VanIwaarden and I wrote a blog post on this topic in April
which can be found here: https://www.nciea.org/blog/sgp/issues-and-
considerations-covid-19-pandemic-presents-measuring-student-growth
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2021 SGP Calculation
• I have discussed whether growth can be calculated in 2021 and whether it can
be used for accountability (e.g., school or teacher) with more than two-dozen
states.
• Simple answer: Yes, SGPs can be calculated using 2019 (and earlier data) as
priors.
– Several states have been calculating two-year growth for years when there is not annual
sequence of tests. For example, 8th to 10th grade growth in ELA or Mathematics or End of
Course testing.
– Growth projections which yield Adequate Growth Percentiles (AGPs) will also be calculable in
• The harder question is whether these SGPs can/should be used as part of state
accountability.
– Are two-year SGPs valid as indicators of annual growth?
– Beyond technical viability, is it tenable (e.g., politically) to use two-year SGPs as a substitute for
one-year SGPs?
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2021 SGP Calculation
• Are two-year SGPs valid as indicators of annual
growth?
– The paper on which this presentation is based shares some
findings and will be discussed hereafter.
• Is it tenable (e.g., politically) to use two-year SGPs as
a substitute for one-year SGPs?
– A much harder question that likely differs from state to state.
– Answering it well requires technical due diligence which,
hopefully, this report/presentation begins to address.
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New Hampshire SGP Calculation
• New Hampshire has had SGPs calculated for a decade,
going back to the NECAP assessment system.
• New Hampshire assesses students in ELA and
Mathematics in grade 3, 4, 5, 6, 7 and 8.
• As mentioned previously, there is no summative data
in 2020 due to the COVID-19.
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Possible 2020 New Hampshire SGP Work
• If New Hampshire is interested in calculating/using SGPs in
2021, part of due diligence would include:
• Using historical data from 2016 to 2019, two-year SGPs from
2017 to 2019 were calculated using 2019 as the dependent
variable and 2016 and 2017 as the independent variables
(i.e., order 1 and 2 SGPs)
– Two-year SGPs are calculated for grades 5, 6, 7, 8 in ELA and
Mathematics.
– SGPs are calculated separately for each norm-group.
• One-year SGPs from 2018-2019 were available from
previous SGP analyses.
– One-year SGPs are calculated for grades 4, 5, 6, 7, and 8.
– SGPs are calculated separately for each norm-group.
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Summary
• SGP calculations can occur in 2021 but will be different than
previously done (they span 2 years).
• Whether those calculations can be used for accountability
encompasses two dimensions:
– How closely (historically) has two-year growth (skip-year) aligned with
the traditional one-year growth that has been calculated.
– Even if it is technically tenable to use two-year in lieu in one-year
growth, is it practically tenable.
• Running due diligence analyses on historical data is a first
step toward this 2021 issue.
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For more information:
Center for Assessment
www.nciea.org
About this copy
New Hampshire 2020 Skip-Year SGP Analyses — New Hampshire Technical Advisory Committee, June 29, 2020.
This is an image-based copy of the original PowerPoint slides; builds and animations are flattened.