Presentation on theme: "Measuring Growth Using the Normal Curve Equivalent"— Presentation transcript:
1 Measuring Growth Using the Normal Curve Equivalent MAT-8Measuring Growth Using the Normal Curve EquivalentNCE
2 New Developments MAT-8 vs. MAT-7 NCEs vs. GEs and NPR’s National Heritage Academies (NHA) will now be using the Metropolitan Achievement Test, Eighth Edition (MAT 8) with Ready Reports software.This will be the first year NHA will use normal curve equivalents (NCEs) for teacher evaluations instead of grade equivalents (GEs) or national percentiles (NPRs) to measure achievement gains (growth) per class.Grade Equivelents and NPRs will still be used to report test results to parents and the general public.
3 Choosing Measurements: SS Why we use Scaled Scores (SS)They show absolute growthThey precisely measure how much a child’s achievement has changed from one testing period to the nextIssues with Scaled Scores (SS)They do not show a student’s relative standing within a normative groupThey are only relevant to the particular test being administered
4 Choosing Measurements: NPR Why we use National Percentile Rank (NPR)They show relative standing within a normative groupThey are easily interpretedIssues with National Percentile Rank (NPR)They are non-linear and therefore cannot be used to compute averages
5 Choosing Measurements: GE Why we use Grade Equivalent (GE)They give us a frame of reference that is meaningfulProvides an approximation of student achievementIssues with Grade Equivalent (GE)They are often misunderstoodNot the best indicator of absolute growth
6 Choosing Measurements: NCE Why we use Normal Curve Equivalent (NCE)They are linear (given in equal intervals) and therefore they can be used to compute averages and show growthThey reflect relative standing within a normative groupIssues with Normal Curve Equivalent (NCE)The general public is not familiar with NCEs
8 The Key IndicatorsSUMMARY: What are you trying to show?
9 Measuring Growth: In the past… Grade Equivalents and NPRs were used to demonstrate growthFor …NCEs will be used to measure growthBased on what we’ve seen thus far… we can conclude that NPR’s and GE’s are not the best indicators of growth
10 Measuring Growth: Benefits to Teachers… Adjustments will be made to take into account initial class standing within the normative group(Classes will be weighted: Low, Average, High)NCEs will provide data that can be appropriately averaged and compared(Provides a more accurate depiction of growth)This explains why we are using NCE’s.
11 Measuring Growth: NCE Growth What NCE growth looks like…If growth is…Equal to “0” = 1 year of growthGREATER than “0” = more than 1 year of growthLESS than “0” = less that 1 year of growthShows what NCE growth would look like
12 Measuring Growth: Expectations What we should expect…We should expect an average of no less than 1 year growth in a classroomWe will reward teachers who achieve 1 year growth and above in their classroomsAppraisal points will be earned relative to the degree of growth
13 The Process: Overview Measuring Growth STEP 1: Take PreTest Mean STEP 2: Take PostTest MeanSTEP 3: Compare Pre-Test and Post-Test to determine gain or lossSTEP 4: Find “level” of PreTest Mean (Low, Average, High)STEP 5: Compare gain or loss to target gainSTEP 6: Evaluate teacher based on percentage of target attained
14 The Process: Gain or Loss Step Determining Gain or Loss…Each class will have an average NCE gain or loss based on its PostTest meanPostTest NCE – PreTest NCE = NCE Gain (or Loss)
15 The Process: Levels Step 4 - Determining Levels… Each class will be assigned to a “level” based on the PreTest Mean (see Table 1)If your PreTest Mean is:Each level represents a range of scores based on Mean=50 and SD=3.86 of the sample distribution of means
16 The Process: Target Gains Step 5 - Determining Target Gains…Each class will have a target gain based on the “level” assigned to that class…Each grade will have different target gains for Low, Average, and High categories (see Table 2)EXAMPLE: If your class PreTest NCE Mean is “average” (from Table 1) then your class would be compared to the “average” target NCE gain (from Table 2)
17 The Process: Conversion Step 6 - Converting to Percentage…Each class average is then compared to it’s target gain…Actual NCE Gain/LossTarget NCE Gain= % of Target AttainedAnd a percentage is calculated…
18 The Process: Teacher Appraisal Teacher Evaluation…The calculated percentage is the percent of goal attainedEach teacher will be evaluated based on how close they were able to get their class to the Target Gain… 100%
19 The Process: Teacher Appraisal Converting to Teacher Appraisal PointsThe percentage of the expected growth achieved is then converted into teacher evaluation points using the following scale
20 The Process: Teacher Appraisal Key 0 = Below 0% NCE score growth = less than 1 year growth3 = 0% to 49% NCE score growth = 1 to 1.19 years growth4 = 50% to 99% NCE score growth = 1.20 to 1.39 years growth5 = 100% and above NCE growth = 1.4 years growth or greater
21 The Process: Calculating Points Calculating Teacher Appraisal PointsSee the Interactive SpreadsheetClick HereSelect “Enable Macros” when prompted