IELTS Writing Task 2: 'language learning' topic

IELTS Writing Task 2: 'language learning' topic

Some experts believe that it is better for children to begin learning a foreign language at primary school rather than secondary school. Do the advantages of this outweigh the disadvantages?

Here's a plan for a 4-paragraph essay:

1. Introduction: Topic = best age to learn a foreign language. Our opinion = better to learn at primary school age.
2. Disadvantages of learning languages at primary age: other subjects are more important at that age (maths, mother tongue language, science), learning a new language is confusing and wastes time, could delay development of child's first language.
3. Advantages of learning languages at primary age: young children learn faster, they are less self-conscious or shy, they pick up the pronunciation better, they enjoy copying and learning through games, nowadays languages are just as important as maths etc.
4. Conclusion: repeat / summarize your answer.

Source: ielts-simon.com