CLIL, BICS, and CALP — Bridging Everyday Language and Academic Thinking
Over the years, I’ve seen how easily students can appear “fluent” in a second language — chatting confidently with peers — yet still struggle deeply when faced with academic texts or abstract classroom discussions.
That difference lies at the heart of CLIL and the balance between BICS and CALP.
BICS (Basic Interpersonal Communicative Skills) refers to the language of everyday interaction — social conversations, greetings, or classroom routines. These skills develop relatively quickly, often within 1–2 years.
CALP (Cognitive Academic Language Proficiency), on the other hand, is the language of schooling — reasoning, hypothesizing, comparing, evaluating, summarizing. Developing CALP can take five to seven years, even for motivated learners.
In a CLIL classroom, these two dimensions intersect constantly.
Students are not only learning content through another language; they’re also learning to think, reason, and communicate in that language at a deeper, more academic level.
