This study explores the challenges faced by high school science learners when they use English language as a medium of instruction in a South African context. Questionnaires were administered and focus group interviews were conducted with both science learners and science educators. Results indicated that learners are challenged in a number of ways when English is used to teach science especially if English is not their home language. Both learners and educators prefer to be taught and teach science respectively in English though ideally learners would like to be taught in their home languages. To overcome these challenges a home language scientific register should be drawn to cater for all learners’ home language, learners should also be proficient in English or language of science instruction. / Science and Technology Education / M. Ed. (Natural Science Education)

This study explores the challenges faced by high school science learners when they use English language as a medium of instruction in a South African context. Questionnaires were administered and focus group interviews were conducted with both science learners and science educators. Results indicated that learners are challenged in a number of ways when English is used to teach science especially if English is not their home language. Both learners and educators prefer to be taught and teach science respectively in English though ideally learners would like to be taught in their home languages. To overcome these challenges a home language scientific register should be drawn to cater for all learners’ home language, learners should also be proficient in English or language of science instruction. / Science and Technology Education / M. Ed. (Natural Science Education)