Keeping ants in a classroom is the oldest STEM demonstration that never gets old. The reason is
simple: the colony answers back. Students ask a question on Monday and can read the answer in the
nest on Wednesday, which turns a unit on life cycles into something they are doing rather than
something they memorised. This guide lays out a six-week plan that works with the CurioDen gel
and sand habitats, and it works with any clear observation form you already own.
Week 1 – Set up and settle
Day one is setup day, and it should be calm. Seat the cartridge or sand column, dampen the
substrate evenly, and close the lid. The mistake most classrooms make is opening the habitat again
within the first two days to “check” that the ants are alive. Ants that are still exploring do not
need to be watched; they need to be left alone. By day four most colonies have started their first
tunnels, and by the end of week 1 there is usually a visible line of traffic between the entrance
port and the first chamber.
Student task for week 1: draw the nest as it looks on day one, and label the parts they can
actually see. Then predict where the tunnels will go.
Week 2 – The first excavation
By now the colony has usually committed to a direction. Record the tunnel length every second
day and mark the change on a shared chart. The surprising result, almost every time, is that the
excavation rate is not constant: it spikes, plateaus, and then spikes again when a chamber is
finished. That pattern is worth calling out explicitly, because students tend to assume ants work
at a steady pace.
Week 3 – Chambers and function
This is the week to introduce the idea that a nest has structure with a job attached to each
part. Brood chambers look different from food stores. Waste chambers get used and then sealed
off. Ask students to propose what each space is for before you tell them, and let them argue about
it. The argument is the lesson.
Week 4 – Feeding and the colony as a system
Feed on a fixed schedule, and keep the schedule visible on the wall. Ant colonies are good at
regularity, and students are good at noticing regularity, so a predictable feeding day gives them
something concrete to track. This is also the natural moment to introduce trophallaxis, the food
exchange between workers, because it is visible on a good camera setup.
Week 5 – Measuring and graphing
Hand out a data sheet with a tunnel-length column and a chamber-count column. Have students plot
the data rather than just writing numbers down. Graphing is where the vocabulary of a science
course starts to attach to something the students already care about.
Week 6 – What changed, and what comes next
Close the unit by putting the first week’s drawing next to the current nest. Ask the same
question you asked in week 1: what do you predict now? Then let them write a paragraph answering
it. The gap between the two answers is the real assessment, and it is a lot harder to fake than a
worksheet.
Practical notes
- Do not ship live ants in cold weather. Transit time matters more than people
expect, and a colony that arrives cold may not recover. - Keep one spare habitat per six stations. A dropped cartridge ends a station
for the week, and a spare turns that into a five-minute swap. - Logistics first. Decide who changes the food and on what day, before the unit
starts. Habitat care fails when nobody owns it. - Keep a journal. Six pages per student is enough. The value is in the
longitudinal record, not in the writing quality.
Written for teachers running an ant colony unit with CurioDen habitats. Teacher guides, lesson
plans and classroom sets are available on the classroom
kits page.
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