I've been doing some searches on assessment lately as part of our work coordinating the European Erasmus+ eAssessment project. If you have any recommendations for me please leave a comment or get in touch. Anyway, I very much like the diagram I found from Impact Wales.
Impact Wales say they provide research informed bespoke support for schools.
I would call this formative assessment as denoting that the assessment is designed to support the learner. But I also like the term low stakes.