The Word Family Framework (WFF) places 22,000 words on the Common European Framework of Reference for Languages (CEFR). It shows how words within the same family are placed at different levels and is aimed at teachers who can use it to plan courses, syllabi and lessons. The WFF is the product of an ELT reasearch award and was designed by Richard West.
This looks cool! Dictionary with CEFR-rated words and word forms is exactly what you need in order to prepare for international exams. Great stuff! Many thanks!