Final answer:
The dual route model suggests children should be taught languages through a bilingual education that leverages their native language and the new language, as it reinforces learning and cognitive development. Research supports that a bilingual approach leads to better outcomes than a monolingual one. Immersion in language-associated culture and using various forms of language, like sign language, can also enhance language learning.
Step-by-step explanation:
The dual route model proposes that children learning all languages should take advantage of the cognitive benefits provided by engaging with multiple languages. This model supports the concept of utilizing a child's native language along with a new language to foster better understanding and to support cognitive development. Essentially, children should learn through a bilingual education system where they are exposed to both languages like English and Spanish, which helps reinforce their learning across various subjects such as math, science, and computing, as seen in the case study of Lucy. The integration of both languages in the educational system aids children in maintaining their cultural identity while acquiring a new language, and research has shown that this bilingual approach can lead to better overall learning outcomes compared to monolingual education.
Evidence supports that the most successful language learners are those who immerse most deeply in the culture associated with the new language. Additionally, the use of sign language in conjunction with spoken language for children, as illustrated with the baby making a sign for 'bird', indicates that multiple forms of language instruction can provide a deeper cognitive reinforcement and greater chance of recall. Hence, following the guidance of the dual route model, children should learn languages through multiple avenues, which could include formal instruction, cultural immersion, and the use of different language forms such as sign language.