Curriculum Development Foundation Netherlands (SLO)

SLO is an expertise center for curriculum development. The expertise center has a lot of knowledge about the curriculum and its development. SLO designs and tests, for example, the attainment targets or exam programs. The expertise center also supports schools in choosing the right teaching materials. The SLO focuses on primary, special and secondary education.

De AOb presented the negotiation agreement for a new collective labor agreement SLO in mid-January 2021. Due to the corona crisis, the negotiators did not submit large wish lists and the consultation was limited to two subjects: the wage section and the collective days off. Download the complete collective labor agreement below.


The term of this CLA is: 1 January 2021 to 31 December 2022.

Main points from the current collective labor agreement:

  • It is a two-year collective labor agreement
  • All employees will receive a structural salary increase of 2,5 percent from January 1, 2021 and 2 percent from January 1, 2022.
  • The article about collective leave days (article 19 paragraph 2) will be amended. With effect from 2022, one day will be designated as a collective day off on the day after Ascension Day.
  • Three days (24 hours) are added to the non-statutory leave balance. The leave is allocated pro rata for part-time employees. Employees can record this in the usual way.
  • For 2021, a number of six collective leave days will apply (the day after Ascension Day and five days between Christmas and New Year's Day), as decided by the management on 1 October 2020 and agreed with the works council on 20 October 2020.

Have a say in the collective labor agreement

AObmembers participate in discussing the collective labor agreement. As the AOb- negotiator reaches a negotiator agreement with the employers, members will receive a newsletter in their email in which the agreements are briefly explained. A digital membership consultation is also held and employees can give their opinion on the agreement reached.

Our negotiators

AObsector manager Herman Molleman negotiates on behalf of the AOb about this CLA.