The Trends in International Mathematics and Science Study (TIMSS) 2015 will be the sixth administration of TIMSS carried out since 1995, resulting in a 20-year trend measurement of 4th- and 8th-grade student achievement. TIMSS is sponsored by the International Association for the Evaluation of Educational Achievement (IEA) – an international organization of national research institutions and governmental research agencies. TIMSS 2015 will assess the mathematics and science knowledge and skills of 4th- and 8th-graders internationally and will collect via questionnaires background information that can be used to improve teaching and learning in mathematics and science. A brochure providing a brief description of the study is available here.
In addition to the 4th- and 8th-grade assessments, TIMSS 2015 will include the third administration of TIMSS Advanced since 1995. TIMSS Advanced 2015 assesses internationally final-year secondary students' achievement in advanced mathematics and physics. The study will also collect policy-relevant information about students, curriculum emphasis, technology use, and teacher preparation and training. A brochure providing a brief description of the study is available here.
TIMSS 2015 was initiated in February 2013 when representatives from participating countries and education systems started developing the assessment frameworks that guided the international development of items (test questions). The data collection for the main survey will be carried out in October–December 2014 for southern hemisphere countries, and March–June 2015 for northern hemisphere countries. The international reports will be released in December 2016, followed by the international database and user guide in February 2017.
Examples of all TIMSS assessment questions can be found here and TIMSS questionnaires can be downloaded from here. For other information or questions, see the Frequently Asked Questions (FAQs) here or you can use the “Contact Us" button at the top of the page.
More information about TIMSS and related resources, including the TIMSS International reports, TIMSS assessment frameworks, and international data files, are available at the TIMSS International site.