Neuroscience shows that the human brain is highly malleable, especially in the early years of life. Therefore, when a child learns an additional language, different areas of the brain are activated, such as the prefrontal cortex, which is responsible for attention and decision-making.

This additional stimulation creates stronger neural connections, resulting in greater cognitive flexibility, problem-solving ability, and improved performance in various areas of learning.

In addition, studies show that bilingualism strengthens memory and improves focus—skills that are essential for academic and personal success. 

Krashen's Theory and Natural Language Acquisition

Linguist and education researcher Stephen Krashen has developed a theory that explains how people naturally acquire a second language. His approach focuses on acquisition, rather than on the conscious learning of grammatical rules.

According to the theory, immersion in a language-rich environment, where communication is the primary tool, is the best path to successful learning.

Krashen argues that language acquisition occurs subconsciously through meaningful exposure to the language in real-life situations. He proposes five main hypotheses, which are widely applied in bilingual education programs and language teaching around the world, including at Systemic:  

The Hypothesis of Comprehensible Input

Krashen's theory is based on the Comprehensible Input Hypothesis, which states that people learn a language when they are exposed to information that is slightly above their current level of understanding.

Simply put, it’s like offering a small dose of challenge while still ensuring comprehension. For example, when telling a story in English to a child, using pictures, gestures, and familiar words makes it easier to understand the context, even when new words are introduced.

This method allows children to acquire the language naturally, without conscious effort. 

The monitor's hypothesis

Krashen also presents the idea that, although the conscious learning of grammatical rules has its value, it serves only as a “guide” that helps correct errors in formal situations, such as writing. However, true fluency is achieved through acquisition, not through formal study.

This concept is particularly relevant in bilingual environments, where the priority is natural communication rather than memorizing rules. 

The Hypothesis of Affection

Another pillar of Krashen’s theory is the importance of emotional factors in language learning. He describes the “affective filter, ” which can be low or high, depending on the learner’s emotional state.

When a child feels comfortable, motivated, and secure in their environment, their emotional filter is lowered, and they learn more easily. On the other hand, anxiety and a lack of confidence make it harder to acquire a language.

In practice, bilingual schools that use Krashen-based approaches create a welcoming environment where students feel comfortable experimenting with the language without fear of making mistakes. 

The Hypothesis of the Natural Order

The linguist also suggests that the acquisition of linguistic structures follows a predictable and universal order, regardless of the language. For example, children learn to use simple words and short sentences before developing more complex grammatical skills.

This underscores the importance of allowing students to progress at their own pace, without pressure to master structures that are beyond their current stage of development. 

The Late Production Hypothesis

Krashen also states that language production—that is, speaking and writing—should occur naturally and at the right time. Before producing language, students need time to absorb and internalize it.

In Systemic’s bilingual program, for example, this timeline is respected, and there is specific content for students who did not receive a bilingual education from the start of their school career—the “Late Bilingual” program.

The Application of Krashen's Theory in Systemic

Krashen’s theory inspires methods that prioritize continuous and meaningful exposure to the target language. At Systemic’s partner schools, English is introduced in a playful way through hands-on activities, interactive reading, and projects that integrate the language into students’ daily lives, including through the teaching of other subjects—such as math, geography, and science—in English.

This environment fosters natural language acquisition and helps children achieve fluency efficiently, while respecting their individual pace and reducing emotional barriers to learning. Children acquire the additional language spontaneously, just as if they were learning their native language.

In other words, investing in a bilingual education means investing in your child’s future. By giving your child the opportunity to learn a new language, you’ll be providing a range of benefits that will positively impact his or her personal and professional life.

Cognitive Benefits of Bilingualism

Learning an additional language is not just a linguistic exercise, but also a form of mental exercise. Bilingual children develop greater multitasking abilities and are better at ignoring distractions—skills that give them an advantage in a world full of stimuli.

Studies show that bilingual adults have a reduced risk of developing dementia and Alzheimer's disease, which demonstrates that the benefits of bilingualism extend throughout one's entire life.

Mastering two languages from an early age also enhances children’s communication skills, allowing them to interact with people from different cultures and broaden their perspectives. This boosts self-confidence, as students feel better prepared to tackle challenges, whether through international travel, school presentations, or even watching movies and TV shows without subtitles.

Neuroscience shows us that the brain of a bilingual person functions differently, offering several benefits:

Greater cognitive ability

Studies show that bilingual children tend to perform better on tests of logical reasoning, problem-solving, and memory. This is because a bilingual person’s brain is constantly working to select the correct language, which strengthens neural connections and increases mental flexibility.

Improved attention and concentration

By switching between two languages, the bilingual brain develops a greater ability to focus on a specific task, even in environments with many distractions.

Increased creativity

Exposure to different cultures and ways of thinking—which comes from learning a new language—stimulates creativity and the ability to find innovative solutions.

Protection against neurodegenerative diseases

Research suggests that bilingualism may delay the onset of diseases such as Alzheimer's and dementia, as it keeps the brain more active and healthy.

The Value of Learning in English

Imagine a child who learns English alongside Portuguese at a bilingual school, such as those offered by Systemic’s partner schools. Not only does the child learn both languages, but also absorbs content in math, science, the arts, and other subjects in English.

Students learn through an integrated approach, which reinforces their command of the language in a practical and meaningful way, allowing academic content and the practice of the additional language to occur simultaneously and naturally.

Choosing a Bilingual Education for the Future

The bilingual education offered by Systemic’s partner schools goes far beyond language instruction, providing a transformative educational experience aligned with the latest research in neuroscience and language acquisition.

By enrolling your children in a school that values bilingualism, you’ll be investing in their cognitive, social, and cultural development, preparing them for a bright future anywhere in the world.

To learn more about this topic, check out other articles on the Systemic blog. You’ll discover how we’re revolutionizing education in Brazil through bilingual education!

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**This text does not necessarily reflect the opinion of Bett Brasil.

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