The purpose of this research was to investigate the major patterns in content-based instruction (CBI) lesson plans among practicum teachers at the final stage of an MA TESOL program. One hundred and seven lesson plans were coded according to a typology developed to evaluate clarity and identify areas of potential difficulty in the design of content and language objectives by TESOL teacher candidates for use in PreK-12 ESL classrooms. Participants in our study tended to have more difficulty in designing language objectives than content objectives. There was also a tendency to write language objectives that focused heavily on the four language skills and on vocabulary, and considerably less often on grammatical structures, functions, or language learning strategies.