30
Sep
Most ESL lesson planning problems aren’t visible until you’re standing in front of the class. The plan looked complete on paper — then the timing fell apart, an activity that seemed clear turned into confusion, or the lesson simply didn’t go anywhere. Here are the mistakes behind that, and what experienced teachers do differently.
Mistake 1: Starting from activities instead of lesson aims
This is the most common trap in ESL lesson planning, and it’s an easy one to fall into: you find an engaging activity, build a lesson around it, and only afterwards ask what it was actually teaching. The result is a lesson that feels busy but doesn’t add up to a clear outcome. It’s the same instinct behind another common habit worth checking — talking through an explanation instead of letting students do the talking.
Teacher trainers consistently frame this the other way round. The aim comes first — a specific statement of what learners should be able to do by the end of the lesson — and every activity is then chosen because it serves that aim, not the reverse. If you can’t explain what an activity is teaching, it’s usually a sign to cut it, however fun it is.
A vague aim like “practise the present perfect” doesn’t give you much to plan against. A sharper one — for example, using “for” and “since” with the present perfect to talk about duration — tells you exactly what to teach, what confusion to anticipate, and how to check whether it landed.
Mistake 2: Overloading the lesson
New teachers in particular tend to plan too many activities, often out of a fear of running out of things to do and being left with dead time. The instinct is understandable, but it usually backfires: lessons become rushed, activities get cut short just as they’re working, and the actual aim gets less attention than the padding around it.
The more reliable approach is to plan slightly less than you think you need, sequenced properly, with a genuine understanding of why each stage is there — rather than planning defensively against silence.
Mistake 3: Explaining activities instead of demonstrating them
A wordy explanation of a task, especially at lower levels, often creates the very confusion it’s trying to prevent. Learners are listening to language they don’t fully understand yet, in order to work out what to do with language they also don’t fully understand — which is a lot to ask in one go.
The more effective habit is to keep instructions short and demonstrate rather than explain: show an example, get one or two students to demonstrate back, and only then let the whole class begin. This single change tends to solve a surprising number of “the class didn’t understand what to do” problems — and it overlaps directly with good classroom management, since most disruption starts with confusion, not misbehaviour.
Mistake 4: Ignoring what students already know
A lesson that treats every topic as brand new — even when it partly isn’t — tends to under-challenge students and quietly erode motivation. If there’s no genuine challenge, there’s little learning happening, and no learning tends to mean no motivation either.
This is where reviewing previous language earns its place in a plan: not as filler, but as a deliberate bridge that lets a new lesson build on what’s already there, rather than starting from zero every time.
Mistake 5: Treating the plan as fixed once it’s written
Plans are working documents, not scripts. Some of the most useful lesson planning skill isn’t in the writing stage at all — it’s in noticing, mid-lesson, that something isn’t working and adjusting rather than pushing through the plan as written because it’s what’s on the page.
This is also one of the hardest skills to build alone. Reading about good planning tells you what to aim for; watching your own plan collide with an actual class — and getting specific feedback on what happened and why — is what actually changes how you plan next time.
A quick self-check for your lesson plan structure
A few honest questions tend to catch most of the mistakes above before they reach the classroom:
- Can I state, in one sentence, exactly what students will be able to do by the end?
- Does every activity clearly serve that aim, or is one there just because it’s engaging?
- Have I planned to demonstrate the trickier instructions, not just explain them?
- Am I building on what students already know, somewhere in this lesson?
- If this doesn’t go to plan, do I know what I’ll cut or adjust on the spot?
Where this becomes a trained skill
Lesson planning is one of the areas where feedback changes things fastest — because the gap between a plan that looks fine on paper and one that actually works in the room is often invisible until someone experienced points it out. On the CELTA course, this is exactly what observed teaching practice is built around: planning a lesson, teaching it, and getting specific, individual feedback on what worked and why, lesson after lesson.
At CELTA Training Romania, that cycle of planning, teaching, and feedback runs through the entire course, in both the Part-Time Online and Intensive Face-to-Face formats — because learning how to plan an English lesson, more than most teaching skills, is genuinely difficult to improve without someone watching it play out.
Save this for your next lesson and discover what teaching practice involves if you’re curious how this kind of feedback works on a CELTA course.
FAQ
What’s the most important part of a lesson plan? The aim. A clear, specific statement of what learners should be able to do by the end of the lesson shapes every other planning decision — the activities, the timing, and what you check for.
How detailed should a lesson plan actually be? Detailed enough that you know exactly why each stage is there and what problems learners might have — but not so scripted that you can’t adapt when something doesn’t go as planned.
Why do lessons that looked good on paper sometimes fall flat in class? Often because the plan was built around an activity rather than an aim, or because instructions were explained rather than demonstrated, leaving students unsure what to actually do.
Is it normal for lesson planning to take a long time when you’re starting out? Yes, very normal. Most experienced teachers report the same thing early in their careers — planning gets faster with practice, a clearer sense of your own patterns, and feedback on what’s actually working.
Should I always finish every activity I’ve planned? No. Being willing to cut or shorten an activity that isn’t working, rather than pushing through it because it’s on the plan, is itself a planning skill worth building.