ESA

ESA (Engage–Study–Activate) is a lesson framework proposed by Jeremy Harmer in How to Teach English (1998) and refined in The Practice of English Language Teaching (2001, subsequent editions). It was designed as a more flexible alternative to PPP, retaining the idea of distinct lesson phases but allowing them to be sequenced in multiple orders.

The Three Elements

Engage — The teacher arouses learners' interest and emotional involvement. This might involve a provocative question, an image, a short video, a personal anecdote, or a game. The goal is to activate learners' minds and create a reason to engage with the language. Without engagement, study and activation are mechanical.

Study — Learners focus on language construction — how something works. This includes grammar explanation, vocabulary work, pronunciation drilling, discourse analysis, or any activity where the primary focus is on form and meaning of specific language items. Study can be teacher-led or learner-driven (e.g., Guided Discovery).

Activate — Learners use language as freely and communicatively as possible. Role plays, discussions, creative writing, problem-solving tasks, information gaps. The focus is on communication, not on specific language items, though learners may naturally deploy recently studied language.

Lesson Sequences

Harmer's key insight is that these three elements do not have to follow a fixed order. He proposes several common sequences:

• Straight arrow (E → S → A): Closest to PPP. Teacher engages, studies a language point, then activates. Works for presenting new language.
• Boomerang (E → A → S → A): Learners try to communicate first (Activate), the teacher identifies gaps, studies the needed language, then learners activate again. Functionally similar to Test-Teach-Test.
• Patchwork (E → A → S → A → S → E → A...): Multiple study and activate phases interwoven, with re-engagement as needed. Reflects the non-linear reality of most lessons.

Why It Matters

ESA acknowledges that no single lesson sequence works for all contexts, learners, or language points. By naming three functional elements rather than prescribing a fixed order, it gives teachers a planning vocabulary without a straitjacket. A teacher can describe what is happening at any point in a lesson (Are we engaging? Studying? Activating?) and make principled decisions about what should come next.

The framework is particularly useful for less experienced teachers who need structure but find PPP too rigid. It provides guardrails — every lesson should contain all three elements — while permitting flexibility in sequencing.

Limitations

• Theoretically light: ESA is a practical planning tool, not grounded in SLA research. Harmer does not make strong theoretical claims for it, which is both a strength (it is unpretentious) and a weakness (it offers no explanation of why these three elements promote acquisition).
• Engage is vague: The boundary between genuine cognitive engagement and superficial "fun" warmers is not always clear. A teacher who equates Engage with "play a game" misses the point.
• Study inherits PPP's assumptions: When the Study phase involves pre-selected language items taught in isolation, ESA faces the same SLA critiques as PPP — that it assumes a synthetic syllabus and linear acquisition.
• No assessment mechanism: Unlike Test-Teach-Test, ESA does not build in a diagnostic moment. The teacher decides what to study based on the syllabus or coursebook rather than on evidence of learner need (unless using the boomerang sequence).

ESA in Practice

ESA's real value is as a reflective lens rather than a rigid template. A teacher planning a lesson can ask: Where is the engagement? Where is the study? Where is the activation? If any element is missing, the lesson is likely unbalanced — all study and no activation produces knowledge without fluency; all activation and no study produces fluency without accuracy.

The boomerang and patchwork sequences overlap considerably with principles from Task-Based Language Teaching and Test-Teach-Test, making ESA a useful bridge between fully teacher-led and fully learner-driven approaches.