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Growth Planner API
Plot a student's projected growth using Lexile or Quantile measures.
About Growth Planner API
The Growth Planner allows users to track previous assessment results reported as Lexile and Quantile measures and use the current and historical assessment data to forecast and monitor growth toward key milestones from as early as 3rd grade. The growth forecast can be used to determine if the student is on track to be college and career ready by 12th grade.

APIs
- Scoring Service API
  Assigns an ability estimate to an assessment-taker in the form of a Lexile Reading, El Sistema Reading, or Quantile measure.
- Lexile Text Analyzer API
  Analyzes text to produce Lexile text measures on custom content.
- Titles API
  Access more than 470,000 hardcover, e-books, paperback, trade and other titles.
- Forecasting API
  Forecast an individual student or group performance on an upcoming assessment.
- Growth Planner API
  Plot a student's projected growth using Lexile or Quantile measures.
  - About Growth Planner API
    The Growth Planner allows users to track previous assessment results reported as Lexile and Quantile measures and use the current and historical assessment data to forecast and monitor growth toward key milestones from as early as 3rd grade. The growth forecast can be used to determine if the student is on track to be college and career ready by 12th grade.
    - Lexile Framework for Reading
      The Lexile Framework for Reading is a scientific approach for measuring both reading comprehension ability and text complexity and places both measures on the Lexile scale. When used together, these measures can help match a reader with reading material at an appropriate difficulty or help give an idea of how well a reader will comprehend a text. Students may be matched with reading material that facilitates the optimal growth in their reading comprehension ability.
    - Quantile Framework for Mathematics
      The Quantile® Framework for Mathematics is a scientific approach to measuring both the difficulty of a mathematical skill, concept or application (called Quantile Skill and Concept [QSC]) and a developing mathematician’s understanding of the QSCs in the following areas: Geometry; Measurement; Number Sense; Numerical Operations; Algebra and Algebraic Thinking; and Data Analysis and Probability.
  - API Calls
- Oral Reading API
  Measures a student's oral reading ability and the oral readability of text on the same scale.
- PowerV API
  Create and access vocabulary lists for over thousands of titles with the Titles Database.
- Career Database API
  Identify a career’s reading and math demands in Lexile and Quantile metrics for goal setting and career preparedness.

About Growth Planner API

The Growth Planner allows users to track previous assessment results reported as Lexile and Quantile measures and use the current and historical assessment data to forecast and monitor growth toward key milestones from as early as 3rd grade. The growth forecast can be used to determine if the student is on track to be college and career ready by 12th grade.

The Growth Planner API does three tasks:

Plots the student's current measurement and any historical assessment data.
Projects the student’s likely growth through Grade 12.
Compares projected growth to a standard.

To plot measurements, the API needs to know the grade level of the student (grade), the Lexile or Quantile measures, the date the test administered (date), and an estimate to describe what part of the school year the test was administered (using date and school_year_start_date). The measurements are then plotted at the appropriate place within the grade (on the x-axis).

To project growth, the API projects where the student will likely measure at the end of Grade 12. If the student has less than 4 Lexile or Quantile measures, the API chooses one of the ten decile curves that best approximates the student's provided measurements (examination of residuals to identify the decile curve with smallest sum of square residuals). If the student has four scores, then the API calculates a trajectory for the student (quadratic model using OLS). This curve is then examined to determine if the maximum is reached prior to Grade 11. If so, then one of the ten decile curves is substituted.

The API is available using an XML-RPC request.