In our language classes we are measuring students’ ability to use the language, not what answers they get “right” or “wrong,” what words are memorized/forgotten, or which mistakes are made. Proficiency based instruction promotes and assess students’ ability to understand and use the language to accomplish a task. This does not measure memorization of specific words, but rather asks students to use whatever they know. 

“Proficiency describes what a language learner is able to do at any time, anywhere, under any circumstances. Performance describes what a student is able to do with language that they have learned and practiced. Performance is based on classroom instruction, practiced, and stays within familiar content and contexts.” (Wayside Publishing 2024