Sheltered Instruction Strategies Every Content Teacher at an International School Should Know

Here's a number that surprises most school leaders: in many international schools in Vietnam, a big share of students are multilingual learners. They're sitting in science, history, and math classes that were planned for native English speakers.

Their teachers aren't doing anything wrong. They're strong in their subject, and they care. But very few were ever trained to teach language and content at the same time. That's the gap sheltered instruction closes, and it doesn't take a second degree to learn.

I'm Kevin Saxton, and I've spent 12+ years teaching and coordinating ELL programs in the US, Korea, and Vietnam. These days I run ELL training in Vietnam for international school teachers. Here are the sheltered instruction strategies I'd hand to any content teacher on day one.

What is sheltered instruction?

Sheltered instruction is an approach to teaching grade-level content to English language learners (also called EAL students or multilingual learners) in a way they can actually understand. You don't water down the content. You change how you deliver it: with clearer language, more support, and more chances to practice. You may also hear it called SIOP-style teaching, after the well-known protocol many schools use as a model.

The goal is simple: every student learns the content and builds their English while doing it.

1. Write language objectives, not just content objectives

Most teachers post a content objective: "Students will explain the causes of the French Revolution." Sheltered instruction adds a language objective: the specific language students need to do that task.

For example: "Students will use because and as a result to explain causes in writing."

Ask yourself: What will students need to read, write, say, or hear in this lesson? Then teach that language on purpose.

2. Teach vocabulary before it blocks understanding

A multilingual learner can follow an idea but get stuck on one word. Pick the five to eight words that matter most, then teach them with images, examples, and quick practice before the lesson starts. Word walls, semantic maps, and word-part strategies all work well.

3. Activate prior knowledge, in any language

Your students know a lot. They just may not have the English to show it. Before a new unit, use a quick KWL chart, an anticipation guide, or a four corners activity. Let students talk with a partner in their home language first. It primes their thinking and makes your English-medium instruction land harder.

4. Make your instruction comprehensible

Ask yourself honestly: Am I easy to understand? Slow your pace a little, use shorter sentences, and avoid idioms unless you explain them. Rewrite task instructions in plain language, and put them in writing as well as saying them aloud. This is the single fastest change most teachers can make, and it helps every student, not just ELLs.

5. Build in supported interaction

Language is learned by using it. Give students structured chances to talk: sentence frames and stems, partner work, jigsaw activities, and information-gap tasks. Add wait time, too. Waiting just a few extra seconds after a question gives multilingual learners time to process and respond.

6. Use scaffolding and graphic organizers

Scaffolding means giving students temporary support, then slowly removing it. Graphic organizers, sentence frames, and visual aids help students handle complex tasks while their English grows. Repeatable routines matter here. When students know the strategy, they spend their energy on the thinking.

7. Differentiate for the learner in front of you

A newcomer and a student who's almost fluent need different things. Differentiate the content, the process, and the product. Offer choices in how students show what they know. Assess what they understand, not just how well they write in English.

8. Use translanguaging

Students' home languages are an asset, not an obstacle. Let them brainstorm, read, and discuss in whatever languages they know, then produce work in English. This approach, called translanguaging, lets students draw on their full linguistic profile.

Why this works better with training and coaching

Reading about these strategies is a good start. Using them well takes practice, plus feedback from someone who's watched you teach. That's why my ELL training in Vietnam is hands-on and in person, and why I offer instructional coaching afterward. Teachers leave a session with real lesson materials they built themselves, not just a binder of ideas.

If your school is looking for professional development for ELL teachers, or you want your content teachers ready to support multilingual learners, I'd love to talk. I work with international schools across Vietnam, in Hanoi, Hai Phong, and beyond.