A Practical Guide to ESL Teaching

✍️ Written by , ELT Editor — CELTA & DELTA.
Reviewed by James Okoro, Curriculum Writer — MA Applied Linguistics, for accuracy against current ELT practice and exam specifications.
Educational guidance from language teachers. This guide is written by qualified ELT professionals for learners and teachers of English. It explains language concepts and exam preparation strategies, not legal or immigration advice. Always confirm current exam formats and requirements on the official test websites. See our full disclaimer.
An ESL teacher leading an interactive English class with adult learners
An ESL teacher leading an interactive English class with adult learners

Staging a lesson: presentation, practice, production

A durable lesson shape is PPP: present new language in context, practise it in controlled exercises, then let students produce it freely. Another is the task-based shape: students attempt a real task, notice their gaps, then refine. Both work; the key is a clear arc where students move from receiving to using language. The Cambridge English — Learning English outlines these frameworks for teachers.

Giving instructions students follow

Most classroom confusion comes from unclear instructions, not from the task itself. Give instructions before, not after, you hand out materials. Keep them short, sequence them, and check with a concept question: ‘What will you do first?’ Demonstrate the task with an example before students start.

Error correction that helps

Correcting every error kills fluency and confidence. Choose what to correct based on the lesson’s aim: during fluency activities, note errors for delayed feedback; during accuracy practice, correct the target form. Self-correction is powerful — repeat the error as a question (‘She go?’) and let the student fix it. Peer correction works for older learners when the atmosphere is supportive.

A learner-centred classroom

The teacher should talk less than the students. Maximise student talking time through pair and group work, open questions, and information-gap activities. Your job is to set up tasks that force language use, then monitor and support — not to perform. A class where the teacher talks for 70% of the time learns little.

Mixed levels in one class

Most classes have mixed levels. Differentiate by task (same topic, different difficulty), by support (more scaffolding for weaker students), and by grouping (pair stronger with weaker for mutual benefit). Open-ended tasks let each student produce at their own level — a question like ‘Tell me about your weekend’ works for everyone.

Differentiating instruction for mixed-ability classes

Real classrooms are rarely homogeneous. Even in a class labelled “intermediate,” some students breeze through a reading while others struggle with the same text. Effective teachers plan for this range rather than pretending it does not exist. Differentiation can take several forms: providing the same task at different difficulty levels, offering a choice of response formats (write, draw, discuss), or grouping students strategically so stronger learners support weaker ones while consolidating their own understanding.

A practical approach is the “tiered task” model. Set a single learning objective — for example, “students will describe a past holiday” — but offer three tiers of support. Tier one learners get sentence starters and a vocabulary bank. Tier two learners get the topic and a model paragraph to reference. Tier three learners get only the prompt and are challenged to produce a fuller, more detailed narrative. Everyone works on the same skill, but the scaffolding matches their readiness. This approach keeps the whole class engaged and prevents the common problem of fast finishers growing bored while struggling learners fall behind.

Giving feedback that students actually use

Feedback only improves learning if the student engages with it, and many traditional feedback practices fail this test. Scrawling “good” or circling every error in red ink tells the student little about how to improve and can feel discouraging. Effective feedback is specific, timely, and actionable. Instead of “work on grammar,” write “check your subject-verb agreement in paragraph two — you wrote ‘the students was’ instead of ‘the students were.’” The student knows exactly what to fix and why.

Timing matters too. Feedback given immediately after a task, while the work is still fresh, is far more likely to be applied than feedback returned a week later. Consider the ratio of correction to encouragement: research suggests that focusing on one or two priority error types per assignment, rather than flagging every single mistake, produces better long-term improvement because the student is not overwhelmed. And wherever possible, give students a chance to revise based on the feedback — the act of correcting their own errors, guided by specific comments, is where the deepest learning happens.

Key takeaways

  • Lesson planning balances presentation, controlled practice, and free production in a clear arc.
  • Differentiate instruction for mixed-ability classes through tiered tasks and strategic grouping.
  • Feedback should be specific, timely, and focused on one or two priority areas, not every error.
  • Give students opportunities to revise based on feedback; correction drives deeper learning than passive receipt.
  • Comprehensible input and a supportive, low-anxiety classroom accelerate acquisition.

Frequently asked questions

Do I need a CELTA or TEFL certificate to teach ESL?

Many schools require a recognised certificate such as CELTA or Trinity CertTESOL, especially for better-paid roles. A certificate gives you the lesson frameworks and observed teaching practice that make you effective quickly. Some entry-level roles accept a TEFL, but CELTA/DELTA carry more weight.

How much should the teacher talk in a lesson?

Roughly 30% or less. The students should do most of the talking through pair and group work. High teacher talking time usually means low student practice time. Plan tasks that shift the talking onto the learners.

How large can an ESL class be before quality suffers?

There is no single threshold, but most teachers find that above 20-25 students, individual attention and speaking practice per student drop sharply. Smaller classes (8-15) allow for more pair work, personalised feedback, and targeted support. Large classes can still be effective with careful structuring — group work, peer correction, and clear routines — but they require more management skill.

Should I correct every error a student makes?

No. Over-correction discourages learners and overwhelms their capacity to process feedback. Focus on errors that impede communication or that relate to the lesson’s specific language point. Let minor slips go during fluency activities; address accuracy during focused practice. The goal is improvement over time, not error-free output from beginners.

Sources & further reading

Guidance is drawn from the authoritative ELT sources above. Examples and explanations are provided for educational purposes; always check current exam specifications on the official test websites.

About this guide. The English language guidance above reflects general teaching principles and current exam information at the time of writing. Language norms and test formats can change; verify specifics with official sources such as IELTS, ETS, and Cambridge English. Our editorial policy explains how we research and review every article.