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Ongoing project

1+1 project

Small group Instruction in Mathematics for Pupils Level 1-4.

Project period 2016 - 2021
Project employer Norges forskningsråd
Project nr. 10146 / NFR: 256217
Project leader Vibeke Opheim (NIFU)

Project Purpose

The purpose of the «1+1 project» is to investigate what happens to students’ abilities in mathematics if an additional teacher is used to providing them with small group instruction in mathematics. The project is aimed at students in lower elementary school.

The project will take place in ten large municipalities, geographically spread across the country. The participating municipalities are: Asker, Bærum, Bodø, Drammen, Sandefjord, Sarpsborg, Stavanger, Trondheim, Tromsø and Ålesund. All together the project includes 160 schools from the participating municipalities.

Project Approach

To investigate whether small group instruction in mathematics improves students’ abilities in mathematics, a randomized controlled trial will be carried out where the schools are separated into two groups of equal size – a treatment group and a comparison group. The schools in the treatment group will receive resources to hire an additional teacher, qualified to teach mathematics, while the schools in the comparison group continue as before. It is important that the schools are randomly assigned to the two groups so that the additional teacher is the only difference between the two groups.

By comparing students’ ability in mathematics at the beginning and end of each school year, we will be able to investigate the effect of small group instruction in mathematics on student’ learning. The project will continue for four school years (2016-2020) and will provide new knowledge on the effect of increasing teacher density in a Norwegian context.

See also:


Henning Finseraas PhD Affiliated Researcher +47 482 83 631 Send e-mail
Inés Hardoy Dr. polit. Research Professor +47 472 45 113 Send e-mail
Pål Schøne PhD Research Professor +47 986 22 125 Send e-mail


  • Oddny Judith Solheim & Vibeke Opheim (2018). Beyond class size reduction: Towards more flexible ways of implementing a reduced pupil-teacher ratio. International Journal of Educational Research.  s 1- 8

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Published June 10, 2016 3:52 PM - Last modified June 18, 2020 1:53 PM