How Speaking Two Languages Helps Your Child Succeed in School

Parent concern number one: “If I raise my child bilingual, will it affect their English? Will they struggle in school?”

Parent concern number two: “What if bilingualism distracts from academics in the early years?”

I hear these questions constantly, and I understand them. You want your child to succeed. You want them to read at grade level, perform well in math, and not fall behind. The idea that adding a second language might interfere with that is understandably scary. But here’s what the research actually shows: bilingualism doesn’t distract from academic success. Decades of studies find that bilingual children do just as well as their monolingual peers on standardized tests, reading, math, and English outcomes. Learning a second language does not come at the cost of academic achievement. Some research even points to possible cognitive benefits, though that evidence is mixed and still debated.

This isn’t wishful thinking. It’s backed by decades of large-scale studies. I’m going to walk you through what the research actually says, the specific ways bilingualism supports your child, and how to feel confident that raising your child bilingual supports their schooling rather than distracting from it.

Executive Function: The Cognitive Superpower of Bilingualism

The first and most significant academic benefit of bilingualism is something called executive function. This includes working memory, attention control, and cognitive flexibility.

Every time a bilingual child uses language, their brain has to manage two languages at once. They hear a word in Spanish, retrieve it from their Spanish system, choose not to activate English, and respond appropriately. The theory is that this constant cognitive management exercises executive function.

Some research suggests bilingual children may develop stronger executive function than monolingual children, though large reviews have found the effect is inconsistent and may be smaller than early studies implied. When it does show up, what does that mean in practical terms? A child can focus, switch between tasks flexibly, tune out distractions, and manage working memory efficiently.

These are the exact skills that predict academic success. A child with strong executive function can sit through a math lesson, ignore the distraction of classmates, remember instructions, and apply them to a problem. Those are school skills — and whatever edge bilingualism may or may not add, raising your child with two languages certainly won’t stand in the way of building them.

Reading Comprehension and Literacy Skills

Here’s what researchers have found about bilingual children and reading:

Bilingual children read right alongside their monolingual peers. Multiple studies comparing bilingual and monolingual children find that learning to read in two languages doesn’t hold reading comprehension back. Bilingual children make inferences, remember details, and answer comprehension questions on par with their monolingual classmates.

Why? Partly because literacy skills transfer across languages, so nothing is lost in the exchange. Partly because bilingual children often have more exposure to literacy (books, stories, narration) across two languages. And partly because managing two sound systems can build phonological awareness — an understanding of how language sounds are constructed — which supports reading skill.

Learning to read in two languages doesn’t slow reading down. This might seem counterintuitive — you’d expect dividing literacy exposure across two languages to set a child back. But a bilingual child who starts learning to read in English develops English reading skills right on pace with a monolingual English-speaking child. The skills built in one language transfer to the other.

The explanation is that reading skills — decoding, phonological awareness, comprehension strategies — transfer across languages, so time spent building literacy in one language isn’t lost when a child reads in the other.

Math Problem Solving and Abstract Thinking

Math is abstract. You can’t point to a number and say “that’s a three” in the way you can point to a dog and say “perro.” Math requires abstract thinking, which is a high-level cognitive skill.

Because bilingual children constantly manage two language systems, some researchers have suggested this could support flexible thinking — but the evidence there is mixed. What is clear is that bilingualism doesn’t get in the way: bilingual children solve math word problems and tackle complex math right alongside their monolingual peers.

This isn’t because bilingual kids are smarter. The point isn’t that two languages turn a child into a math whiz — it’s that carrying a second language costs them nothing when it comes to math. Bilingualism and strong math skills go hand in hand just fine.

Standardized Test Performance

Here’s what large studies of bilingual programs actually find:

Bilingual children hold their own on standardized tests. Studies of bilingual programs show that bilingual children score comparably to — and in some dual-language programs, eventually above — monolingual peers on standardized tests in reading, math, and overall achievement. Notably, this holds even when bilingual children spend less total instructional time in English, which tells you learning in two languages doesn’t come at English’s expense.

In dual-language immersion programs, students often catch up to and pull ahead of their peers by around third to fifth grade. Early on, students in these programs can look slightly behind on English tests, but they typically close that gap and sometimes surpass it in later elementary years. One caveat worth naming: families who enroll in immersion programs often differ in other ways (motivation, resources, home literacy), so part of this edge reflects who chooses these programs, not language alone.

Learning a language at home doesn’t undercut school performance. If your child is being educated in English but also learning Spanish at home, that home language doesn’t hold back their English schooling. Children can thrive academically while growing up with two languages.

Social and Emotional Skills

Academic success isn’t just about test scores. It’s also about ability to work with others, manage emotions, and navigate social situations. Bilingual children show advantages here too.

Managing two languages requires mental flexibility, which translates to social flexibility. Bilingual children are often better at perspective-taking (understanding what someone else is thinking or feeling), managing group dynamics, and communicating across differences.

These aren’t measured on standardized tests, but they’re crucial for actual school success. A child who can work in groups, communicate effectively, and navigate social challenges is set up for success in ways that go way beyond reading and math scores.

The Research Is Actually Pretty Clear

Here’s what you can share with skeptics:

Research published in the journal “Language Learning” shows that bilingual children develop stronger metalinguistic awareness (awareness of how language works), which directly supports literacy development in both languages and their academic success in reading-focused subjects.

This isn’t wishful thinking. The best-established finding in the research is simple and reassuring: bilingualism does not harm academic achievement. Children can grow up with two languages and read, do math, and test right alongside their monolingual peers — and in some dual-language settings, eventually come out a bit ahead.

What About in the Early Years?

Here’s the only caveat: in very early childhood (ages 2 to 4), bilingual children sometimes have slightly lower vocabulary counts in any single language compared to monolingual peers. This is completely normal and expected.

But this early difference doesn’t predict academic outcomes. In fact, it evens out by early elementary school. Bilingual children catch up in single-language vocabulary and, measured across both languages, typically match or exceed the total vocabulary of their monolingual peers. That early gap is not a sign that bilingualism costs your child anything academically.

More importantly, the early vocabulary difference is so small and so quickly resolved that it’s not a sign of a problem or a reason to stop bilingual exposure. You’re not sacrificing your child’s academic future by raising them bilingual in the early years.

How to Set Your Child Up for School Success in Both Languages

If you want to maximize your child’s academic advantages from bilingualism, focus on consistency and rich language exposure in both languages. Inconsistent bilingual exposure might mean your child develops more strongly in one language than the other, which changes the pattern of benefits.

Rich language exposure means conversation, reading, storytelling, and diverse vocabulary across different contexts — not just passively hearing language or limited daily interaction.

This is where having a structured approach helps. For a comprehensive guide to building consistent, rich bilingual exposure throughout your child’s early years, see our article on how much Spanish exposure your child needs. It breaks down the research on exposure levels and shows you what “rich exposure” actually looks like in practice.

Also check out our guide to bilingual development milestones. Understanding what’s typical for bilingual children at each age helps you feel confident that your child is developing normally, even if they’re slightly behind in any single language in the early years.

And for building literacy specifically, see our guide to bilingual books for toddlers. Early literacy exposure is one of the strongest predictors of later academic success, and building it bilingually sets your child up for advantages.

Share This With Skeptics

If your child’s teacher, your pediatrician, or a family member expresses concern about bilingualism affecting school performance, you have actual research to share. The American Speech-Language-Hearing Association supports bilingual development. The American Academy of Pediatrics supports bilingual exposure. And the research consistently shows that bilingualism does not hold children back academically.

You’re not making a sentimental choice to keep Spanish alive in your family (though that’s valuable too). You’re making a choice that’s good for your family and safe for your child’s schooling. Your child gets a second language and a lifelong cultural connection — at no cost to their academic development.

Want to share the research with people who question your bilingual approach? Download our free bilingual resources guide. It includes summaries of key research on bilingualism and academic benefits, so you have studies and data to back up your decisions.

Your Child’s Bilingual Future

Here’s the bottom line: raising your child bilingual is not a risk to their academic success. You’re not choosing between English proficiency and Spanish — your child can become fully proficient in English while also growing a second language.

Your child will learn English. They’ll learn to read in English. They’ll succeed academically in English. And they’ll do all of it while gaining a second language and everything that comes with it — a wider world, deeper family ties, and doors that stay open for the rest of their life.

For a complete program that builds bilingual development strategically across ages 2 to 5, positioning bilingualism as a strength for your child rather than a risk, our 12-Month Bilingual Curriculum is built on research-backed approaches to language exposure, literacy development, and cognitive growth through bilingualism.

Get the curriculum and raise your child with confidence that bilingualism is supporting, not hindering, their school readiness and academic success.

Your child’s bilingual brain is nothing to fear — and the research has your back. Bilingualism supports your child’s future without costing them their schooling.