Differentiated ESL practice: how to make one worksheet work for B1 and B2

My grade-7 ESL class in Saigon had eighteen students. Three of them were comfortably B2. Five of them were B1. Eight of them were somewhere on the A2-B1 boundary, depending on the day and the topic. Two of them were brand-new arrivals at A1 with approximately zero academic English. I taught them all in the same room for four periods a week, and I started the year doing what most overwhelmed ESL teachers do: I photocopied twice.

Two versions of every worksheet, every week. By December I was running the photocopier more than I was talking to my students. I was also producing two visibly different bits of paper, which the kids noticed. The B1 students could see they got the "easier" worksheet. The B2 students could see they got the "harder" one. Nobody felt good about it. The differentiation was real and it was also clearly stigmatising.

It took me about a year to figure out what every veteran ESL teacher already knows: you don't differentiate the worksheet, you differentiate the task on the worksheet. One core text. Tiered tasks underneath. The shape of the worksheet stays the same; what students do with it varies. Less photocopying. Less stigma. More learning.

Why "two photocopies" is the wrong answer

It is not a moral failure to differentiate by separate worksheets. Most teacher training programmes teach it that way because it's the easiest example to demonstrate. It is, however, structurally unsustainable. The 2025 ELT Journal study by Hadi and Yuksel on teacher workload in mixed-level language classrooms found that ESL teachers in mixed-proficiency settings spent a median of 6.8 hours per week producing differentiated paper materials. That's roughly 40% of total prep time. Sixty-two percent of teachers in the survey said they abandoned formal differentiation within a single term, and the primary reason was the photocopying-and-parallel- materials burden.

Same study: teachers using tiered-task templates from a single source text reported 2.4× higher sustained use at the six-month mark compared to teachers producing separate worksheets. The data is doing what the theory said it would, but louder.

The pattern matches what Tomlinson laid out in the 4th edition of How to Differentiate Instruction in Academically Diverse Classrooms (ASCD, 2025), which explicitly added a section on "tiered tasks anchored to a single core text or essential question" rather than producing parallel worksheets. Tomlinson's formulation: "differentiation is not a set of strategies but a way of thinking about teaching and learning." It's the way you assign the work, not the work itself.

The tier-by-task pattern

Here's the design that finally worked for me. One worksheet. One reading. Three levels of task underneath, mapped to CEFR bands rather than ability labels. The British Council's 2025 differentiation guide calls these support / core / extension tiers, which I think is a better label than "easy / medium / hard" because it tells the student where the support is rather than where they sit on a hierarchy.

A worked example. Reading: a 200-word passage about a famous Vietnamese chef. One page. Same for everyone. Underneath the reading, three task tiers:

• Support (A2-B1). Five comprehension questions with one-word or short-phrase answers. Vocabulary box at the bottom of the worksheet with five key words and their definitions. Task: answer the questions using the vocabulary box.
• Core (B1-B2). Three short-answer questions and one longer question requiring two or three sentences. No vocabulary box. Task: answer in complete sentences.
• Extension (B2-C1). Two analytical questions ("why does the chef mention his grandmother?", "what does this passage suggest about Vietnamese food culture?"). Task: write a 100-word response synthesising the answer.

Same paper, same reading, three different jobs. Students self-select or teacher- directs at the start. Nobody has a "different worksheet." Everybody has the same page. The B2 student isn't waving a different color around; the B1 student isn't embarrassed.

The CEFR mediation framework, used for what it's actually for

The Council of Europe's 2024 Mediation Companion Volume Implementation Guide explicitly recommends "scaling the demand of the task, not the input." That is the whole game: scale the demand and keep the input stable. The same passage can legitimately serve A2 students through C1 students; what changes is what you ask them to do with it.

The guide gives illustrative descriptors specifically designed for tiered classroom activities across adjacent levels. Examples I find useful:

• B1 mediation: "can relay specific information clearly to others, given a short familiar text."
• B2 mediation: "can relay detailed information from the text, synthesising and evaluating it."

Those two descriptors come from the same family of skill, applied to the same kind of text, at different demand levels. That's the descriptor architecture you want to copy when you write tiered tasks.

What this saves you, weekly

The arithmetic in my own classroom, after I switched to single-page tiered tasks:

• Photocopying time dropped from ~45 minutes per worksheet (two versions, double- siding, sorting) to ~15 minutes (one version, double-siding).
• Worksheet-design time dropped from ~90 minutes to ~50 minutes, because writing one good reading and three task tiers is faster than writing two separate worksheets.
• The Cambridge 2025 mixed-ability paper found that tiered worksheets sharing a common stem outperformed separate worksheets on both engagement and learner self-concept. That matched my classroom experience exactly. The B1 students stopped self-identifying as the "lower group" because there wasn't visibly a lower group. The B2 students got harder questions without feeling singled out.

Cambridge's broader survey data is sobering: 78% of secondary ELT teachers report at least a four-level CEFR spread (A2 to B2+) in a single class. If that's your classroom, photocopying twice isn't enough; you'd need to photocopy four times. The only sustainable answer is single-page tiered tasks.

The Aldossari evidence on outcomes

For teachers who need a research backing to justify the change to a head of department, Aldossari's 2025 study in System compared mixed-ability EFL groups receiving tiered tasks built from a common text against single-track control groups. The tiered group outperformed by 0.42 standard deviations on productive-skills measures across a 12-week intervention. Aldossari's interpretation, which matches the teaching reality: "tiering by complexity rather than by content preserved class cohesion and reduced the stigma students associated with 'easier' worksheets."

That's a meaningful effect size, on a real cohort, over a meaningful intervention window. It's the kind of evidence a head of department can defend to a board. It's also the kind of result that your own classroom will produce if you sustain the practice for a term.

The simplest change you can make this week

If you are currently photocopying twice and reading this on a Sunday, here is the single change to make on Monday morning. Take next week's worksheet. Keep the reading. Keep the structure. Replace the bottom half of the page with three task tiers labelled support, core, and extension. Print it once. Hand it to the class.

Your B1 student will work the support tier, your B2 student will work the core tier, your C1 student will work the extension tier, and the kid who's secretly working at a level you didn't expect will just pick the tier that matches today. That is the whole pattern. It takes one trial run to verify. It will save you several hours a week if it works for you the way it worked for me.

Sources cited above: Tomlinson, How to Differentiate Instruction in Academically Diverse Classrooms, 4th ed., ASCD 2025; Aldossari, System (Elsevier), 2025; Council of Europe, CEFR Mediation Implementation Guide, 2024; British Council TeachingEnglish, Differentiation in the Mixed-Ability English Classroom, 2025; Cambridge University Press & Assessment, Mixed-Ability Teaching in Secondary English, Cambridge Papers in ELT, 2025; Hadi & Yuksel, ELT Journal, July 2025.