What files are available to me?

If the sections below do not answer your question(s), you may wish to consult the study documentation.

thumbnail of file organization chart

A file organization chart is available that includes the file name for each file available through the MET Longitudinal Database (LDB), along with the name and number for the ICPSR study in which each file can be found. It also lists the primary IDs included in each file to aid users in merging files or linking data within or across studies. Each file is provided in SPSS, SAS, STATA, R and ASCII formats. The ASCII version of each file name is used in the File Name column of the chart (da34771-0001.txt); other formats will follow the same naming conventions but will have different file extensions (da34771-0001.sav, da34771-0001.rda, etc.)


ICPSR has organized the MET LDB data into six collections each of which has an ICPSR "Study Number":

  • Study Information (ICPSR 34771)
  • Core Files, 2009-2011 (ICPSR 34414)
  • Base Data: Section-Level Analytical Files, 2009-2011 (ICPSR 34309)
  • Base Data: Item-Level Supplemental Test Files, 2009-2011 (ICPSR 34868)
  • Base Data: Item-Level Observational Scores, 2009-2011 (ICPSR 34346)
  • Base Data: Item-Level Surveys and Assessment Teacher Files, 2009-2011 (ICPSR 34345)
  • District-Wide Files, 2009-2011 (ICPSR 34344)

ICPSR Study # 34771 - Study Information

Contained in this release are a video information file, a randomization file, a subject ID crosswalk, and a teacher demographics file. The Video Information File contains descriptive information about the videos captured for the MET project and their availability to users. The Randomization File includes district, school, section and student IDs, teacher IDs for the teacher a student was randomly assigned to, and the actual teacher the student was recorded as having in October and May of that year. The Subject ID Crosswalk contains only ID variables and is included to describe the associations between districts, schools, teachers, sections, and students. The Teacher Demographics File contains information on gender, ethnicity, work experience, and levels of education for teachers in the MET project.

ICPSR Study # 34414 - Core Files, 2009-2011

The Core Data Files contain a crafted sample of teachers to facilitate longitudinal analyses, and include only MET teachers who participated in Year 1 or both Year 1 & 2 of the MET Project. No teachers are included who only participated in Year 2 of the MET Project. Additionally, for certain instruments, only aggregated or summary variables are included. No sub-sample instruments or special topic data are included.

ICPSR Study # 34309 -- Base Data: Section-Level Analytical Files, 2009-2011

The Section-Level Analytical files are a merger of demographics, constructed, and summary variables aggregated to the teacher section level for elementary and secondary teachers in both years of the MET study. Variables contained in the release include student race, age and other demographic variables, state test and supplemental test rankings, value-added variables, and student perception survey composite measures.

ICPSR Study # 34868 -- Base Data: Item-Level Supplemental Test Files, 2009-2011

Student achievement was measured in two ways -- through existing state assessments, designed to assess student progress on the state curriculum for accountability purposes, and supplemental assessments, designed to assess higher-order conceptual understanding. The Item-level Observational Scores release consists of data files for the three supplemental assessments (SAT- 9, BAM and ACT) for both years of the MET study.

ICPSR Study # 34346 -- Base Data: Item-Level Observational Scores, 2009-2011

Panoramic digital video of classroom sessions were taken of participating teachers and students, teachers submitted commentary on their lessons (e.g., specifying the learning objective) and then trained raters scored the lesson based on particular classroom observation protocols. This collections consists of item-level scores for each of the observational protocols (CLASS, FFT, MQI, PLATO, QST and UTOP) used across both years of the MET study.

ICPSR Study # 34345 -- Item-Level Surveys and Assessment Teacher Files, 2009-2011

The Item-Level Surveys and Assessment Teacher release consists of four written response surveys, from or about the MET teachers, a teacher knowledge assessment and a survey of curriculum taught by teachers. The written response surveys were given to principals, to gauge their knowledge of their teachers' effectiveness, teachers, to gauge their perception of their principals' effectiveness and of their broader working environment, and students, to analyze the value of student feedback on the effort to improve both teaching and learning. A teacher knowledge assessment was also conducted to test the utility of both newly developed and well established measures of teacher knowledge to predict measures of teacher effectiveness.

ICPSR Study # 34798 -- District-Wide Files, 2008-2011

The district wide files are comprised of one data file per district for each of the two years of the MET project and the school year immediately prior to the MET project. Each file contains information on each student in the school district, including student demographic variables, such as race, age and gender, specialty student status variables such as free lunch, English language learner, and gifted and talented program participation, and student-level test rankings for math and reading, as well as, aggregate means of student demographic, specialty status, and test score variables for each teacher.

The scripts used by the MET Project team at RAND to compute value-added estimates are also included in this collection.

The MET LDB includes six primary IDs that can be used to merge data files; district, school, section, teacher, student, and video. Most files include several IDs, and a MET respondent (teacher or student) or video may appear more than once in any particular file based on the level of analysis in which that file is provided. For example, a teacher who taught three sections of math may appear three times in a file provided at the class/section level. Files at different levels of analysis can be merged, however users wishing to avoid creating files with redundant variables that contain excessive missing values or files with repeated cases with redundant information will need to aggregate variables up to, or disaggregate variables down to, a common analysis level prior to merging. For more information on the analysis level of each file, see the MET LDB Study Organization charts.

Any number of data files that contain the same ID can be merged. Two data files have been created to assist users wishing to merge files on an ID that is not common to each file wished to be merged. The Subject ID Crosswalk contains only ID variables and describes the associations between districts, schools, teachers, sections, and students. The Video Information File contains more than just IDs, but it also provides the relationship between videos and the district, school, teacher, and section from which they were recorded.

More information about merging files, including counts of the number of teachers common across different combinations of files, can be found in Appendix A of the User Guide.