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LAT Value Added Knowledge Share Part 1. YPLA Strategic Analysis & Research team. Championing Young People’s Learning. Topics to be covered. What is LAT Value Added? The history of Value Added systems What a provider would need to know LAT VA methodology LAT VA calculation process

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lat value added knowledge share part 1

LAT Value AddedKnowledge SharePart 1

YPLA Strategic Analysis & Research team

Championing Young People’s Learning

topics to be covered
Topics to be covered

What is LAT Value Added?

The history of Value Added systems

What a provider would need to know

LAT VA methodology

LAT VA calculation process

Ready Reckoner

Data Dashboard

what is value added

What is Value Added?

Championing Young People’s Learning



Mostly at grade C


Mostly at grade A

A-level Biology


Grade B

Grade A

Which one of Jack & Jill “did better”?

Championing Young People’s Learning


Comparing Using Prior Attainment



A level result



National average achievement







Average GCSE grade


What does that look like in numbers?

Both Jack & Jill did better than expected…

…but Jack had more “value added” in terms

of progression from Level 2 to Level 3

concept of value added
Concept of Value Added:

Performance at level 3 (key stage 5) is linked to performance at level 2 (key stage 4)

Providers who recruit only those with good GCSEs will get better A level results – but are they better providers?

Value added tells us how well providers do in comparison to others who have learners with similar prior attainment

Championing Young People’s Learning

a history of value added

A History OfValue Added

Championing Young People’s Learning

history of lat value added
History of LAT Value Added

Originally developed by Framework for Excellence in 2005

Underwent extensive piloting, testing and review

Published on the Provider Gateway

Used by OfSted in inspection process

DCSF then developed own measure (“CVA”) to give provider level value added scores

Ownership transferred from FfE to YPLA & Data Service

Championing Young People’s Learning

comparison with success rates
Comparison with – Success Rates
  • LAT Value Added
  • Achievement only
  • Level 3 graded quals only
  • Looks at grade achieved
  • VA scores are benchmarked against national performance.
  • Success Rates
  • Includes retention
  • All levels & qual types
  • Only looks at pass or fail
  • Result is a percentage which can be compared to national averages
comparison with dfe value added
Comparison with – DfE Value Added
  • LAT Value Added
  • Qual & subject scores only
  • Only uses average prior attainment
  • Average score is 0
  • DfE Post 16 Key Stage 5 VA
  • Institution level score only
  • Uses 20+ factors
  • Average score is 1000
comparison with alps alis
Comparison with – ALPS & ALIS
  • Produced by third parties
  • Uses partial data set
  • Use other statistical approaches
  • Used for internal quality improvement
  • LAT Value Added
  • Produced by government agencies
  • Uses national data set
  • Uses multi level modelling
  • Used by OfSted
what a provider would want to know about value added

What a provider would want to know about Value Added

Championing Young People’s Learning

how is prior attainment calculated
How is Prior Attainment calculated?
  • Data sourced by Fischer Family Trust for YPLA
  • Average of all aims at level 2 and below taken in the last 2 years
  • Means a learner with 3 GCSE A grades has a higher score than a learner with 8 A grades and 2 B grades.
  • Different aims have different weightings (GCSE = 1, GNVQ = 4)
  • Not all aims have the same maximum score
  • Prior attainment calculator on provider gateway
prior attainment examples
Prior Attainment – Examples
  • A Learner attains
  • Six GCSEs at grade C at age 15
  • A merit in an intermediate GNVQ at age 16.
  • The learner then progresses to take an A-level at age 18.
  • Prior attainment for this learner is all attainment up to, and including, age 16:
  • all six GCSEs are assigned 40 points
  • an Intermediate GNVQ merit is assigned 184 points (equivalent of four GCSEs)
  • Total prior attainment is divided by the total size of all qualifications attempted:
  • ((six GCSEs x 40 QCA points) + (184 for the GNVQ))
  • (six GCSEs + the equivalent of four GCSEs)
  • = 424 ÷ 10 = 42.4 QCA points.
how is outcome attainment calculated
How is Outcome Attainment calculated?
  • Sourced by Fischer Family Trust from awarding bodies
  • Used by DfE in Achievement & Attainment Tables
  • Providers have a chance in the Autumn to correct the data
  • Hence un-amended (November) and amended (January) data
  • AS levels that are not cashed in do not appear in the VA data
rebased qca points
Rebased QCA points
  • The actual and expected attainment is shown in QCA points
  • Re-based to get rid of cliff edge with fails
rebased qca points1
Rebased QCA points
  • The gaps between grades differ for different qualifications
    • i.e. 30 points between A level grades
    • but 15 points between AS grades
  • Means that a score of +30 for A levels means the same thing as a score of +15 for AS levels
multi level modelling
Multi Level Modelling
  • So how is the “expected attainment” line calculated?
  • Uses statistical technique called “multi level modelling”
  • Basically an advanced method of getting a line of best fit…
  • …like when you right click on a chart in Excel to get a trendline
  • Multi level modelling used because it analyses the performance of each individual provider AND national picture
  • Used in education research for the last 20 years
shrinkage factor
Shrinkage Factor
  • A number between zero and one
  • For large cohorts, shrinkage factor ~ 1 (no impact on result)
  • For small cohorts, shrinkage factor much less than 1 - reduces the score towards the national average
  • Makes results for small cohorts more reliable and less volatile
  • Large groups or subjects remain virtually unchanged.

Few Cases

Many Cases


Shrinkage Factor


confidence intervals
Confidence intervals
  • Value added results are shown with a 95% confidence interval
confidence intervals1
Confidence intervals

Confidence intervals are wider for small groups of

learners and where results are inconsistent

  • Initial results are at qualification and subject level for each provider (e.g. A level Biology)
  • These are aggregated up to qualification level (e.g A level)
  • …and to sector subject areas (e.g. Science & Mathematics)
  • There is no overall value added score for a provider as combining results from different qualifications does not give a reliable result
  • Results files include data at qualification and SSA level
what gets published

What gets published?

Championing Young People’s Learning

where to find reports guidance
Where to find reports & guidance
  • Providers access their data through the Provider Gateway
  • Previous years guidance on SFA website but YPLA are preparing guidance for 2009/10 data release
  • 2009/10 data due for initial release in mid November
  • YPLA LAT VA webpage:
new report layout
New report layout

For the 2009/10 release a set of pdf reports are being developed to complement the information on the provider gateway

New reports are simpler to understand

new report layout1
New report layout

Colour coding

Green = significantly above average

Blue = significantly below average

Multiple years data

Breakdown by age

Only covers qualification scores – not national comparison charts

provider gateway reports
Provider Gateway Reports

Reports on the provider gateway same as previous reports

Very powerful statistical tools…

…but difficult for someone new to VA to understand


Above Average:



Above Average:



Below Average:



Below Average:




National Comparison Chart








Above average at all points

Below average at all points

Below average for low PA

Above average for high PA

final points
Final points
  • Where providers are part of a consortia there data is merged together and shown for lead provider
  • There was a “Distance Travelled” measure that looked at ungraded qualifications – not calculated since 2006/07