Answer:
Teaching half the day in English and the other half of the day in the second language.
Step-by-step explanation:
The term subtractive bilingualism could simply be described in a scenario where a student intends to learn a second language, such that this comes at expense of the student's first language. That is the student loses the ability to be good or better at his first language as a result of learning a second. In other to avoid this, the two way bilingual education concept is used to fix this issue by apportioning period for each Language lesson. Taking half a day on English and the other half in the second language of choice.