nonproficient
Nonproficient is an adjective used to describe someone or something that lacks the necessary skill, knowledge, or proficiency in a particular area. It indicates a level of competence that falls below what is required or expected. For instance, a student might be considered nonproficient in mathematics if they consistently struggle with foundational concepts and are unable to perform at grade level. Similarly, a tool or system could be described as nonproficient if it fails to perform its intended function effectively or efficiently.
The term is often used in educational settings to identify students who need additional support or remediation.