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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385585

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MATH\HOW OFTEN USE CALC\EXPLORE (BTBM19BD)

Data file: TIMSS-2015-pop2-bg-teacher-math-allcountries-metadata

Overview

Valid: 780

Invalid: 220

Type: Discrete

Decimal: 0

loc_start_pos: 137

loc_end_pos: 137

Width: 1

Range: 1 - 4

Format: Numeric

Questions and instructions

Categories

Value	Category	Cases
1	Every or almost every lesson	136	17.4%
2	About half the lessons	133	17.1%
3	Some lessons	406	52.1%
4	Never	105	13.5%
Sysmiss		220

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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