Abipreppi is an independent service. It is not a product of the Matriculation Examination Board (YTL) or of Yle, and neither has reviewed or approved its content. Exam tasks and grade limits: Source: Ylioppilastutkintolautakunta. Abitreenit and Yo-koekone are Yle services. Explanations, grade estimates and guides are Abipreppi's own.