Why compare formats before you arrive
Student volunteers often plan a lesson around the content, such as greetings, animals or numbers, and leave the format to chance. Then they meet a room with fixed benches, forty learners of mixed ages and a heat that shortens everyone's attention. A format that looked fine in a rehearsal can fall apart when the room is different from the one you imagined.
Comparing formats in advance gives the team a menu rather than a single plan. You can walk into the classroom, look at the space, ask the host teacher about the group, and then pick the format that fits. The three formats here are whole-class, pair work and stations. None is better in general. Each has conditions in which it works well and conditions in which it struggles.
Whole-class: simple, loud, and easy to supervise
In a whole-class format, one volunteer leads while the others support. It needs almost no materials and works in tight rooms. Because everyone is doing the same thing at the same time, supervision is simple, and the host teacher can step in easily. Call-and-response, chanting and short demonstrations all fit this format.
The weakness is participation. In a large group, a few confident learners answer and the rest listen. Quiet or younger learners can drift. Whole-class works best for warm-ups, for introducing a target sentence, and for moments when the group needs a shared reset. It is a poor choice for the whole lesson if you want every learner to speak.
Pair work: more speaking, less control
Pair work gives every learner a chance to speak, because half the room can talk at once. It needs a clear, short task and a model that the pairs can copy. Volunteers circulate, listen and correct gently. The format suits practice of a single target sentence and works with benches as long as learners can turn to a neighbour.
The costs are noise and uneven pairing. Volunteers cannot hear every pair, and some pairs will drift off task. Mixed-age rooms add complications, since an older learner may dominate a younger partner. Agree with the host teacher how pairs are chosen, and keep the task short enough that drifting has little time to start.
Stations: flexible, but heavy on people and planning
Stations divide the class into small groups that rotate through simple activities, such as a picture game, a counting task and a speaking corner. This format gives variety and lets volunteers work with small groups. It can suit a wide range of levels, because each station can have an easier and a harder option.
The price is planning and supervision. Each station needs a volunteer or a clear, self-running task, and the rotation needs timing and a signal everyone understands. In a crowded room, moving groups can be chaotic. Stations work best with a larger team, a roomier space and a host teacher who is comfortable with movement. They are a poor first choice on the first day in an unfamiliar room.
A simple comparison table to use on site
Make a small card with the three formats as rows and four columns: space needed, volunteers needed, materials needed and how many learners speak. Fill it in as a team before departure, using your best guess, and then revise it on site after you see the room. Writing the guess down makes it easy to notice what you got wrong.
The point of the table is not to produce a winner. It is to make trade-offs visible. If the room is tight and the team is small, whole-class and pairs will rank higher. If the room is large and the team is bigger, stations become realistic. Share the filled-in card with the host teacher, who may correct your assumptions quickly.
Mixing formats within one lesson
Most good lessons use more than one format. A common pattern is a whole-class warm-up, a short pair practice of the target sentence and a whole-class check at the end. Stations can replace the middle part once the team and the learners know the routine. Changing format also resets attention, which helps in heat.
Keep transitions short and rehearsed. Agree a simple signal for moving from one format to another, and tell learners what is about to happen before it happens. Each change costs a minute or two, so plan no more than two or three formats in a short lesson. Write the planned order on the lesson card so any volunteer can run it.
Asking the host teacher before choosing
The host teacher knows things your rehearsal cannot show: how learners normally sit, which routines they already use, how much movement is acceptable and how loud is too loud. Ask two or three plain questions on arrival, such as how the class usually works in groups and whether pair work is familiar to them.
Let the answers change your plan. If the class already works in pairs every day, pair work will start faster than a new station routine. If the room has fixed benches, whole-class and pairs are safer. Thank the teacher for the correction, write it on the lesson card and share it with the rest of the team that evening.
Adjusting the format for heat and attention
Heat shortens attention, and a format that works at nine in the morning may struggle at noon. Keep a cooler-weather version and a hot-weather version of each lesson on the same card. In heat, favour shorter activities, more breaks for water and formats that keep learners seated and calm, such as pairs or a quiet whole-class game.
Do not push a planned format through if the room is tired. Shortening the core practice and ending on a friendly check is better than finishing the plan with a restless group. Note the time of day on the card so later teams can see how timing affected the choice of format.
Reviewing what worked and updating the card
After each lesson, the team spends a few minutes on a short review: which format was used, how many learners spoke, what the noise and supervision were like, and what the host teacher said. Record this on the back of the lesson card in plain words. Honest notes matter more than positive ones.
Over a week, these notes become your own comparison, based on this room and this group rather than on guesses. Pass them to the next team so they start with a better menu than you did. Respect the host school's preferences throughout, and avoid photographing children for the record. The notes are about teaching choices, not about individual learners.