For M28 students taking IB exams in May 2028 after starting DP1 in August 2026, aim for roughly 300-500 actively usable words and short phrases in your ab initio language by Christmas. This is a practical benchmark, not an official IB requirement. What you can understand and communicate matters more than your vocabulary list’s length.
This guide explains what that target means, which language to prioritize, and how to check your progress before the holiday.
Does the IB set an ab initio vocabulary target?
The IB does not prescribe a minimum vocabulary total for Christmas, the end of DP1, or the final examination. Language ab initio is a Standard Level language acquisition course intended for students with little or no previous experience of the language.
The course develops receptive, productive, and interactive communication through five prescribed themes: Identities, Experiences, Human ingenuity, Social organization, and Sharing the planet.
M28 students follow the course first assessed in 2020. The enhanced course begins teaching in 2027, with first assessment in May 2029, so it does not apply to May 2028 candidates.
Teachers organize topics differently, so successful students may know different words by December. Use your completed classroom units as your immediate reference.
Why 300-500 vocabulary items is a useful benchmark
Across approximately 14-16 teaching weeks, retaining around 20-30 items weekly produces a vocabulary base broadly within this range. This is a planning estimate, not a grade boundary or research-established milestone.
An item can be a word or useful expression, such as “I usually go,” “in my opinion,” or “last weekend.” These chunks help you combine vocabulary and grammar in usable language.
Counting is approximate: languages differ in how words, characters, and grammatical forms work. Apply a consistent counting method rather than treating the total as an exact measurement.
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