This material is produced by a project funded by the ELY Centre of Häme (The Centre for Economic Development, Transport and the Environment ). The project has involved LAB University of Applied Sciences, South-Eastern Finland University of Applied Sciences and Oulu University of Applied Sciences. Project time is 1.2.2023 - 31.1.2026.[br] [br]The project produces plain language material for recapping mathematics. This lecture material is used in the moodle course KoKo - Towards Education, which is offered at the following universities of applied sciences: LAB, Oulu and XAMK.[br] [br]Target groups are school dropouts, unemployed, career changers, and immigrants.[br] [br]The material is freely available under Creative Commons license CC-BY-NC-SA.[br]