Trends in International Mathematics and Science Study 2015

International, 2015

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Reference ID

int-iea-timss-2015-v1

Producer(s)

TIMSS & PIRLS International Study Center

Collections

TIMSS and PIRLS

Metadata

DDI/XML JSON

Created on

Mar 20, 2021

Last modified

Mar 20, 2021

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384427

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GEN\HOW OFTEN\EXPLAIN ANSWERS (ATBG14B)

Data file: timss-2015-pop1-num-bg-teacher-allcountries-metadata

Overview

Valid: 910

Invalid: 90

Type: Discrete

Decimal: 0

loc_start_pos: 99

loc_end_pos: 99

Width: 1

Range: 1 - 4

Format: Numeric

Questions and instructions

Categories

Value	Category	Cases
1	Every or almost every lesson	556	61.1%
2	About half the lessons	210	23.1%
3	Some lessons	140	15.4%
4	Never	4	0.4%
Sysmiss		90

Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.

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