The Assessment Problem

When your bilingual child enters kindergarten or first grade, they may be assessed in English only. If their English vocabulary is slightly smaller than monolingual classmates, alarm bells can go off. Teachers might suggest a speech evaluation, recommend dropping the home language, or express concern about "language delays."

Here's what the research says: this is almost always a misunderstanding of how bilingual language development works.

Bilingual children's abilities are distributed across two languages. A child might know the word "butterfly" in English and "蝴蝶" in Chinese, but not both in the same language. When you assess only one language, you're seeing only half the picture.

Research published in the journal Bilingualism: Language and Cognition is clear: bilingual children's total vocabulary across both languages typically equals or exceeds monolingual norms. The key is measuring the right things.

What Parents Should Know

Normal Bilingual Development Patterns

These are completely normal for bilingual children and should NOT be treated as concerns:

• Smaller vocabulary in each individual language compared to monolingual peers (total vocabulary across both languages is comparable)
• Code-switching — mixing languages within a sentence ("I want to eat 飯")
• Slight differences in grammar as the child sorts out two systems
• Temporary preference for one language over the other (this often shifts)
• A "quiet period" when entering a new language environment (school)

Red Flags vs. Normal Variation

A genuine language concern affects both languages equally. If your child struggles with grammar, vocabulary, or comprehension in Chinese AND English, that's worth evaluating. If the issue only appears in English while Chinese develops normally (or vice versa), that's a bilingual development pattern, not a disorder.

Preparing for School

Before the First Day

• Inform the teacher that your child is bilingual. Many teachers have limited training in bilingual development and will appreciate the context.
• Share your child's full language profile. What languages does your child speak? With whom? In what contexts? This helps the teacher understand what they're seeing in the classroom.
• Ask about the assessment approach. Will your child be assessed in English only? If so, advocate for the assessment to account for bilingual development norms.

At Parent-Teacher Conferences

Come prepared with specific points:

1. "My child speaks Chinese at home." This simple context can prevent misinterpretation of English-language assessments.

2. "Bilingual children's vocabulary is distributed across two languages." If the teacher notes a smaller English vocabulary, explain that this is expected and that total vocabulary is on track.

3. "Code-switching is a sign of bilingual competence, not confusion." If the teacher reports that your child mixes languages, explain that this is normal and actually demonstrates sophisticated language awareness.

4. "We'd like any assessment to consider both languages." If there are concerns about language development, request that both languages be evaluated before any conclusions are drawn.

What the Research Shows About Academic Outcomes

Parents sometimes worry that bilingualism will put their child at an academic disadvantage. The evidence strongly suggests the opposite:

Short-Term (Kindergarten-2nd Grade)

Bilingual children may initially score slightly lower on English-only vocabulary tests. This gap typically closes by second or third grade, and bilingual children often outperform monolingual peers by middle school.

Medium-Term (3rd-5th Grade)

Research on dual language education shows that bilingual students match or exceed monolingual peers in:

• English reading comprehension
• Math word problems (where language comprehension helps)
• Writing skills

Long-Term Benefits

The executive function advantages of bilingualism translate into academic strengths: better attention control, stronger working memory, and greater cognitive flexibility — all skills that support learning across every subject.

Common Misconceptions Teachers May Have

"You should speak English at home to help your child succeed in school."

This well-intentioned advice is wrong. Research consistently shows that a strong foundation in the home language actually supports English development. Children who lose their home language don't gain English faster — they just lose a language.

"Your child is confused between two languages."

Code-switching and language mixing are not confusion. They're sophisticated cognitive abilities that show your child can draw from two language systems flexibly.

"Bilingual children have learning disabilities."

Bilingual development can sometimes look like a language disorder to untrained observers. Before accepting a diagnosis, ensure that assessment was conducted by someone with bilingual development expertise and that both languages were evaluated.

Building a Supportive School Relationship

The goal isn't to be adversarial with teachers — it's to be a partner in your child's education. Most teachers genuinely want to support every student. They may simply lack training in bilingual development.

What you can do:

• Share a brief one-page overview of bilingual development norms (many are available online from speech-language pathology organizations)
• Offer to be a resource — you know your child's language abilities better than anyone
• Celebrate what's working — when the teacher supports your child's bilingualism, acknowledge it
• Connect with other bilingual families at the school to advocate collectively

Your Child's Bilingualism Is an Asset

In an increasingly connected world, your child's ability to speak Chinese and English is not just "not a problem" — it's a genuine advantage. Schools are slowly recognizing this, with dual-language programs growing rapidly across the country.

Your job is to help your child's school see bilingualism the way the research sees it: as a strength to be nurtured, not a deficit to be fixed.