RA 12027 Mother Tongue Explained: What Teachers Must Know (2026)

Picture this. It’s June 2025, first day of classes. You’re a Grade 2 teacher in Cebu, and for the last ten years you’ve been teaching math in Cebuano — because that’s what the law told you to do. Now your principal walks in and says: “Starting this year, we teach in Filipino and English.”

Just like that. A decade of mother-tongue policy, gone.

That’s RA 12027 in real life. Not a paragraph in a legal document — a Monday morning where everything about how you talk to your class changes. If you teach Kinder through Grade 3, or you’re a parent wondering why your kid’s homework suddenly looks different, this one’s for you.

Here’s the full story: what the law actually says, what changed in real classrooms, how DepEd rolled it out, and what you’re still allowed to do with local languages. No legalese. Promise.

So What Is RA 12027, Really?

Okay, the formal stuff first — then I’ll translate it into human.

Republic Act No. 12027 has one of those titles that takes a full breath to read: “An Act Discontinuing the Use of the Mother Tongue as Medium of Instruction from Kindergarten to Grade 3, Providing for Its Optional Implementation in Monolingual Classes, and Amending for the Purpose Sections 4 and 5 of Republic Act No. 10533.”

Yeah. That’s a mouthful. Here’s the short version: starting Kindergarten to Grade 3, schools teach in Filipino and English again. The mother tongue steps aside.

Now the interesting part — how it became law. Nobody signed it. President Marcos Jr. didn’t veto it either. It just… lapsed into law on October 10, 2024, which is what happens when the President lets the constitutional deadline pass without acting. Fifteen days after publication, it was the law of the land.

To feel the weight of that, rewind to 2013. The K to 12 Law (RA 10533) made mother-tongue instruction mandatory for K-3. Every region, every school — teach the little ones in the language they speak at home. That was the rule for eleven years. RA 12027 reaches into that law, pulls out those exact provisions, and rewrites them.

The new rule, in the law’s own blunt words: the medium of instruction “shall revert to Filipino and, until otherwise provided by law, English.” Regional languages? They’re still around — but as “auxiliary media of instruction.” Fancy term. I’ll explain what it actually means in a minute.

Before vs. After: What Actually Changed

Let me lay it out side by side, because this is the part teachers keep asking about:

What	Before (2013–2024)	Now (RA 12027)
Main teaching language, K–3	Mother tongue / regional language	Filipino and English
Where local languages fit	They were the medium	Helpers — “auxiliary” media
Mother Tongue as a subject	Its own learning area	Gone under MATATAG
MTB-MLE in schools	Required everywhere	Optional, and only in special cases
What teachers need	Fluency in the local language	Filipino/English; local fluency only for the exception
Tests and quizzes	Written in the mother tongue	Written in Filipino or English

Filipino and English Are Back — What That Feels Like

If you’ve been teaching since before 2013, this feels like déjà vu. Back then, Filipino and English were the pair — the bilingual policy everyone grew up with. Then MTB-MLE arrived and shook the table. Now? The table’s back where it was.

What does that mean on a Tuesday morning? Your lesson delivery, your class discussions, the words on your quizzes — all in Filipino and English now. That’s the legal requirement.

But here’s what the headlines miss: the mother tongue isn’t banned. I keep hearing teachers worry about this, so let me be clear. The law calls local languages “auxiliary” — which sounds like bureaucratic cold shoulder, but in practice it means use them when a kid needs help understanding.

And DepEd has said so out loud. Regional directors have gone on record explaining that teachers can absolutely reach for the local language when a pupil is lost. The Cebu regional director put it plainly: the mother tongue isn’t a required subject anymore, but no one’s stopping you from using it to help a child get it.

Think of it this way. Before, the mother tongue was driving the car. Now it’s in the passenger seat with the map — still useful, still there, just not steering.

This also lands right in the middle of the MATATAG Curriculum, which pushes hardest on literacy in exactly these early grades. Our MATATAG Filipino Curriculum Guide shows how Filipino was already positioned as a core learning area for K-3. RA 12027 doesn’t just agree with that design — it makes it law.

The Loophole: When Mother Tongue Can Stay

Here’s the part most summaries skip, and it’s important.

RA 12027 doesn’t kill mother-tongue teaching entirely. Tucked into Section 2 is an exception: schools with monolingual classes can keep using MTB-MLE. But — and it’s a big but — the checklist to qualify is brutal.

A “monolingual class” means every single learner in that grade level, in that school, that year, speaks the same mother tongue. Picture a remote barangay school where all twenty Grade 2 kids speak the same language at home. That’s the starting point. Then you need all five of these:

• An official orthography — the Komisyon sa Wikang Filipino (KWF) has to have developed and published the writing system
• Documented vocabulary — a real dictionary, glossary, or thesaurus, published by the KWF
• Actual literature — big books, picture stories, the works
• A grammar book for the language
• Teachers who can do it — fluent in the language and trained to teach in it

Be honest — how many schools do you know that check all five boxes? Not many. And the data backs that up: a 2019 Philippine Institute for Development Studies survey found only 9% of 16,287 schools met the bar for effective MTB-MLE even before the law changed. The exception was designed to be narrow.

The law also tells DepEd and the KWF to build a language-mapping system within a year — basically a census of who speaks what, so schools can prove (or fail to prove) they have genuine monolingual classes each year. There are administrative sanctions for violations on paper, though so far DepEd’s tone has been guidance, not punishment.

DepEd Order No. 20: The Real Rulebook

Laws point the direction. DepEd orders tell you what to do on Monday. That order is DepEd Order No. 20, s. 2025 — “Policy on the Medium of Instruction for Kindergarten to Grade 3 Effective School Year 2025–2026,” signed by Secretary Sonny Angara.

If you teach K-3, these are the lines that matter:

• Filipino and English are the main media. For Kinder through Grade 3. Including Filipino Sign Language for deaf and hard-of-hearing learners — more on that in a second, because it’s a bigger deal than it looks.
• Local languages get the “translanguaging” job. That’s the official strategy: deliberately switching between languages mid-lesson to bridge what kids know and what they need to learn. Not random code-switching — planned, purposeful bridging.
• It overrides the old MATATAG language rules. Specifically, it rescinds the Key Stage 1 language provisions in DepEd Order No. 10, s. 2024. (Our breakdown of DepEd Order 010 covers the wider MATATAG framework this amends.)
• It started SY 2025–2026. The full language-mapping policy with the KWF was slated for October 2025, feeding into fuller implementation from SY 2026–2027.

Can we talk about the Filipino Sign Language bit? Because it’s genuinely historic. This is the first time a Philippine medium-of-instruction policy has named FSL this explicitly for early grades. It quietly admits something important: “Filipino and English” was never meant as a blunt instrument. The policy calls itself “flexible and context-responsive” — weighing the kids’ language background, what the community speaks, what teachers can handle, and what materials exist.

The paperwork trail, if you’re the type who reads primary sources: DepEd floated a draft IRR for public comment in late 2024, then DepEd Memorandum No. 059, s. 2025 disseminated the final version — published January 27, 2025, effective February 26, 2025. The draft notice is still up at deped.gov.ph if you want to see how it evolved.

Your Classroom, Tomorrow Morning

Enough policy. Let’s talk about your whiteboard.

Teach in Filipino and English. Lesson plans, board work, quizzes — that’s the legal baseline now for K-3.

But use the home language as a bridge. Kid doesn’t get “bilog”? Explain it in the mother tongue, then lock in the Filipino term. That’s not cheating — that’s literally what “auxiliary media” means, and DepEd’s own order names translanguaging as the strategy. Use it with confidence.

Keep simple records. What languages do your learners speak at home? What materials are you using? When the language-mapping framework reaches your division, your school head will need this to argue for — or rule out — monolingual-class status. A notebook page per class is enough.

Read the mapping policy when it lands. It decides whether your school keeps any mother-tongue instruction at all. Don’t let it sit in the division office unread.

Double down on early reading. MATATAG’s literacy push in Grades 1–3 didn’t change — but now Filipino and English carry the entire weight of it. If anything, RA 12027 makes those reading blocks more important, not less. Our guide on the medium of teaching and learning connects the dots.

And for parents reading this: your child’s school now teaches mainly in Filipino and English from Kinder to Grade 3, and teachers may use your home language to help your child understand. If last year was all mother tongue, expect report cards, wall labels, and homework to look different — and give teachers some grace while everyone adjusts. It’s a big shift for them too.

Why Some Cheered and Others Are Furious

This law didn’t come out of nowhere. Senator Sherwin Gatchalian pushed it for years, and his argument was simple: mother-tongue instruction looked good on paper and fell apart in practice. Multilingual classrooms where no single “mother tongue” existed. Materials that never arrived. Teachers assigned to teach in languages they barely spoke. That PIDS stat — 9% of schools meeting the standard — became the law’s knockout punch. After it lapsed into law, Gatchalian told DepEd to move fast, saying teachers would finally use languages that fit their kids.

The other side isn’t buying it. The Alliance of Concerned Teachers (ACT) called it a “significant setback,” and they’re not alone — literacy researchers worldwide have shown for decades that small children learn best in the language they speak at home. Their fear is concrete: in communities where kids show up speaking neither Filipino nor English, the first years of school become years of fighting the language itself instead of learning through it.

Here’s my honest take: both sides are describing real things. MTB-MLE implementation was uneven — that’s documented. And the transition is hard for young learners — that’s also documented. RA 12027 didn’t solve the problem; it swapped one set of classroom headaches for another. Whether it works now depends almost entirely on how well schools pull off the translanguaging bridge the law allows. That’s where the real story is.

Frequently Asked Questions

Is the mother tongue banned in schools now?

No — and I can’t stress this enough, because it’s the most common misunderstanding. RA 12027 ends the mother tongue as the required medium for K-3. Local languages stay as “auxiliary” media. Your teacher can still explain things in the home language when a child needs it.

When did this actually take effect?

October 10, 2024 — that’s when it lapsed into law. The IRR kicked in February 26, 2025. And DepEd’s classroom-level policy (Order No. 20, s. 2025) runs from School Year 2025–2026.

I’m teaching Grade 2. What language do I use?

Filipino and English, primarily. When a kid’s stuck, bridge through the local language first, then anchor the Filipino or English term. That’s translanguaging, and it’s officially sanctioned.

Can my school keep teaching in the mother tongue?

Only if you clear the monolingual-class bar: same language for every learner in the grade, KWF-published orthography and vocabulary, real literature, a grammar book, and trained teachers. It’s a high wall by design.

Does this touch Grades 4 and up?

Not directly — the law is K-3 only. But as MATATAG’s phased rollout reaches younger grades in coming school years, those grades land under the new language rules too. So it creeps upward with the curriculum.

What exactly is translanguaging?

Using two or more languages on purpose inside one lesson — say, introducing a science idea in the local language, then teaching the Filipino and English terms for it. DepEd Order No. 20 names it outright as the strategy. It’s allowed. It’s encouraged. Do it well.

What about deaf learners?

Covered explicitly — DepEd Order No. 20 includes Filipino Sign Language for deaf and hard-of-hearing learners in K-3. First time it’s been spelled out this clearly in a medium-of-instruction policy.

Where do I read the actual law?

Full text is on the Supreme Court E-Library. DepEd’s IRR notice and drafts are on deped.gov.ph. Start with the sources below.

Conclusion

RA 12027 is the biggest language-policy shakeup since K to 12 itself. Eleven years of mandatory mother-tongue teaching for the little ones — over. Filipino and English are back as the main languages of early-grade classrooms, with DepEd Order No. 20 running the show from this school year onward.

But here’s what I keep coming back to: no law teaches a child to read. Teachers do. The schools that handle this well won’t be the ones with the tidiest compliance paperwork — they’ll be the ones whose teachers bridge fearlessly between the language a child brings from home and the languages the law now requires. Watch for that language-mapping policy. Keep notes on your learners. And use every bit of auxiliary-language room the law gives you — it’s there for a reason.

Sources & References

• Republic Act No. 12027, full text via the Supreme Court E-Library (elibrary.judiciary.gov.ph)
• Philippine News Agency, “Law removes ‘mother tongue’ use in kindergarten to Grade 3,” October 12, 2024
• Manila Bulletin, “Bill ending use of mother tongue for teaching in kinder to grade 3 lapses into law,” October 2024
• Manila Bulletin, “Mother Tongue no longer required: DepEd shifts to Filipino, English for K to 3 in SY 2025–2026,” July 2025
• SunStar Cebu, “RA 12027 discontinues use of mother tongue from Kinder to Grade 3,” October 2024
• DepEd, Notice of Drafting of the IRR of RA No. 12027, deped.gov.ph, November 28, 2024
• DepEd Memorandum No. 059, s. 2025, Dissemination of the IRR of RA No. 12027
• DepEd Order No. 20, s. 2025, Policy on the Medium of Instruction for Kindergarten to Grade 3 Effective SY 2025–2026
• Inquirer.net, “DepEd launches recalibrated K to 10 curriculum, to start in SY 2024-2025,” August 2023