An incursion dropped into a random week is a memory. An incursion placed deliberately inside a unit is a lesson. The difference is almost entirely in the timing and the framing, which means the same session run on two different weeks can either anchor a concept or float free of everything around it. Integration is a planning skill rather than a content skill, and it is learnable. Get the placement, the priming and the follow-up right, and a single booking does the work of several lessons. Get them wrong, and you have paid for an afternoon that students remember fondly and learn little from.
Place it in the middle, not the start or end
The instinct is to use an incursion to launch a unit with a bang, or to cap it off as a treat. Both waste it. Used as a launch, students have no prior knowledge to attach the experience to, so it lands as spectacle and the concepts wash over them. Used as a finale, there is no teaching time left to consolidate it, so the experience never gets converted into understanding before the unit closes.
The sweet spot is the middle of the unit. By then students have the vocabulary and the basic concept, so the incursion gives them a vivid, hands-on encounter with something they can already partly name. And because lessons remain after it, you still have the time to turn that encounter into secure understanding. Placement is the cheapest lever you have, and the middle of the unit is almost always where it pays the most.
Prime students the lesson before
Ten minutes of priming the previous lesson changes what students get from a session more than almost anything else you can do. Tell them what is coming, remind them of the relevant concept, and pose a question they will get to answer: "On Thursday you will find out which surface slows a toy car the most. What is your guess, and why?" Now they arrive with a stake in the outcome rather than as a passive audience waiting to be entertained.
This costs almost nothing and roughly doubles the return on the booking, because it converts the session from a show into the answering of a question students have already committed to. Priming is the highest-leverage move in the whole sequence, and it is entirely yours to make. A facilitator cannot prime a class they have not met, so this part of the integration only happens if you do it.
Plan the follow-up before the session, not after
The follow-up lesson is where experience becomes learning, and yet it is usually improvised in the rush of the following week, or skipped entirely, because it was never planned in advance. Decide before the incursion how you will pick it up: the writing task, the discussion, the second investigation that builds on what they saw. Then block the time for it now, while you are planning the unit, rather than trying to find a spare slot afterwards.
Planning the follow-up in advance also sharpens the session itself, because it forces you to decide what the incursion is for. If you know that next Tuesday students will explain the result in writing, you will prime them to notice the right things during the session. The follow-up and the session are two halves of one lesson, and planning them together is what makes them cohere.
Use the experience as a shared reference all term
A well-placed incursion gives you a callback you can use for weeks. "Remember the balloon?" reactivates an entire concept in a single phrase, far faster than re-explaining it would. Strong teachers mine that reference repeatedly: in revision, in assessment framing, in connecting the next topic to the last. The session becomes a permanent fixture in the class's shared memory, available whenever you need to ground an abstract idea in something concrete they all experienced together.
This is one of the underrated returns on an incursion. A single vivid experience, referred back to deliberately, keeps paying off long after the day itself. The students who would struggle to recall a definition will readily recall the moment, and the moment carries the definition with it. The reference is only useful, though, if you keep using it, which is a habit worth building consciously.
Map it to outcomes you can assess
Because a hands-on session generates observable thinking, it is a genuine source of assessment evidence rather than just an experience. Predictions, fair tests and explanations are all things you can capture and judge against a curriculum outcome. Decide in advance which outcome you are watching for and how you will record it, so the session feeds your assessment file rather than disappearing once the facilitator leaves.
The capture can be light. A few photographs of student work, a short recorded explanation, or the written prediction-and-result on a slip of paper all count as evidence. Integration done well means the incursion does double duty, delivering an experience and producing documentation at the same time, which makes it far easier to justify against any other call on the same money.
Coordinate it with the rest of the school
Integration is not only vertical, within a single unit. It is also horizontal, across the school. If several year levels are running the same provider across a term, a little coordination multiplies the value: shared language between year levels, a visible progression as students move up, and staffroom conversations where teachers compare how the same topic landed at different ages. The incursion stops being an isolated event in one classroom and becomes part of a coherent science culture across the school.
This is also where a coordinator earns their keep. Sequencing bookings so they align with units, briefing each set of teachers, and making space for staff to compare notes afterwards are small acts of organisation that turn a scatter of separate sessions into something that adds up to more than the sum of its parts.
