Differentiating for ELL Students in Math and Science

Math and science are often called "ELL-friendly" subjects because they rely on numbers, symbols, and diagrams — universal languages that don't require strong English proficiency to access. That's partially true. But the academic language of math and science is often the biggest barrier ELL students face, and confusing academic language with content knowledge is one of the most common mistakes teachers make.

A student who doesn't understand "trapezoid" is not a student who can't do geometry. A student who doesn't understand "hypothesis" is not a student who can't do science. Differentiating for ELL students in these subjects means separating language support from content expectations — scaffolding the language while maintaining the rigor.

Vocabulary Pre-Teaching (Before the Lesson)

Don't introduce key vocabulary on the same day you introduce the concept. ELL students need processing time. Introduce the unit vocabulary 1–2 days before it appears in instruction.

For math: Fraction, equivalent, denominator, numerator, compare, greater than, less than. Visual anchor charts with the word, a visual model, a student-friendly definition, and an example sentence posted in the room.

For science: Hypothesis, variable, observation, evidence, conclusion, organism, ecosystem. Same anchor chart approach — and include cognates wherever possible. Spanish-speaking ELL students will recognize "hipótesis," "variable," "organismo," and "ecosistema" immediately.

A 10-minute vocabulary preview at the start of the week prevents 30 minutes of confusion every day that week.

Visual-First Instruction

Structure your instruction so that the visual model comes before the abstract representation, not after.

In math, show the fraction bar before the fraction notation. Show the area model before the algorithm. Draw the number line before writing the equation. When ELL students can anchor the abstract symbol to a visual they understand, they can participate in the lesson before they have the language to describe what they're doing.

In science, use diagrams, labeled illustrations, and real objects. A labeled diagram of the water cycle communicates more to a beginning ELL than three paragraphs of text. Start with the diagram, build vocabulary from it, then move to the text.

Sentence Frames for Academic Discussion

ELL students often have more content understanding than they can express in English. Sentence frames give them the structure to show what they know.

Math sentence frames:

• "I know ___ is greater than ___ because ___."
• "The pattern I notice is ___."
• "First I ___, then I ___, finally I ___."
• "These two fractions are equivalent because ___."

Science sentence frames:

• "My hypothesis is ___ because ___."
• "The evidence shows that ___."
• "When ___ changed, ___ happened because ___."
• "This is an example of ___ because ___."

Post these frames during the activity, not just at the start of the lesson. ELL students need them at the moment of production, not five minutes earlier when they were still reading the problem.

Sheltered Instruction for Assessments

The hardest part of differentiating for ELL students is assessment. You need to know whether the student understands the content — but a language-heavy assessment measures English proficiency as much as content knowledge.

For formative assessment:

• Accept responses in the student's home language and use a bilingual aide or Google Translate to review
• Allow drawing or labeling instead of written explanations
• Use multiple choice or matching before requiring constructed response

For summative assessment, check your state's ELL accommodation policies. Most states allow ELL students access to bilingual word-to-word dictionaries, extended time, and translated assessments for math (not always for science). Use every accommodation that's available — that's what they're there for.

Modified Wait Time

Research consistently shows that ELL students need more processing time before responding. The standard 3-second wait time after a question is not enough for a student who is simultaneously processing the question in English, translating it mentally, formulating an answer in their home language, and then translating that answer back to English.

Increase your wait time to 10–15 seconds for ELL students. Use think-pair-share so students can rehearse their response with a partner before sharing with the class. Designate a partner who speaks the same home language when possible — discussing the concept in their first language deepens understanding.

Small Group Pull-Out for Language Support

If your school has an ELL specialist, coordinate with them to align the academic vocabulary and sentence structures they're teaching with what you're teaching in class. A 20-minute pull-out where the ELL specialist pre-teaches the week's key vocabulary and sentence frames — aligned to your current unit — means your ELL students arrive at your lesson already prepared.

This coordination doesn't happen automatically. Email the specialist with your weekly vocabulary list. Make it a routine.

Using Differentiation Tools

LessonDraft's differentiation helper generates ELL-specific versions of any lesson — with built-in vocabulary support, sentence frames, and visual-first suggestions. Paste your existing lesson and specify that you need an ELL adaptation, and it outputs a modified version in about 20 seconds.

The generated version gives you a structural starting point. You'll still need to adjust based on your specific students' English proficiency levels (beginning, intermediate, advanced) and the language supports your school has available.

The most important thing to remember: ELL students are not low-ability students. They are students doing the hardest intellectual task in your building — learning grade-level content in a language they're still acquiring. Every scaffold you provide is an investment in content learning, not a concession on rigor.