3D Printers for Schools: An A1 mini NSW Unit Plan
3 November 2026 · 6 min read · NE3D Printing
Most advice about 3D printers for schools is written for hobbyists. This one is written for someone planning a 10-week term for 30 students, in 60-minute periods, with a budget line that has to be signed off. The printer here is the Bambu Lab A1 mini — small, quiet, PLA-friendly and cheap to feed, which is exactly what a Stage 4 Technology Mandatory classroom needs.
Why the A1 mini fits a Stage 4 classroom
The A1 mini has a 180 × 180 × 180 mm build volume. That sounds like a limitation until you realise it is a teaching constraint: it forces students to design small, think about part orientation, and finish a print inside a lesson block rather than hogging the machine for nine hours.
It runs PLA at roughly 220 °C nozzle and 55–60 °C bed — the lowest-risk material combination you can put in front of a Year 7 class. It is open-frame, so it is not the machine for ABS or ASA; that is a feature in a classroom, because it removes the temptation. Automatic bed levelling and flow calibration mean a relief teacher can start a print without a two-hour induction.
Buy two or three A1 minis rather than one larger enclosed machine. Throughput, not build volume, is what breaks a class unit.
How many printers a class of 30 actually needs
Do the arithmetic before you do the paperwork. A 15–20 g student part at 0.2 mm layers typically takes somewhere in the range of 40–90 minutes on an A1 mini. Thirty students, one print each, plus a realistic 20% re-print rate, is roughly 25–45 machine hours.
| Printers | Realistic class of 30 | Verdict |
|---|---|---|
| 1 | ~5 machine-hours/week for 9 weeks, zero slack | Demo only |
| 2 | Everyone prints once, re-prints fit | Workable minimum |
| 3 | Two iterations each, plus teacher demos | Recommended |
| 4+ | Shared across two TAS classes per term | Faculty-level buy |
Run the machines through lunch and after school, not during lessons. Students watch the first 30 seconds of their own print, then it goes into a queue. A print-queue monitor roster is itself a good assessable task.
A 10-week lesson sequence
Weeks 1–2: identify and investigate
Demonstrate a live print. Students photograph and annotate three existing injection-moulded objects in the room, then write a needs statement. No CAD yet.
Weeks 3–4: CAD skills
Short, scaffolded tasks in a free browser CAD tool — a 20 × 20 × 20 mm cube with a 6 mm hole, then a fillet, then a text emboss. Everyone prints the cube. It is 12 minutes and it teaches tolerance better than a worksheet.
Weeks 5–6: design and model
Students model against the brief below, sketch two alternatives, and justify the chosen one.
Week 7: slice, queue and print
Teach the slicer explicitly: layer height, wall count, infill percentage, supports. Have students record their predicted mass and time, then compare to the slicer's estimate. That comparison is assessable.
Weeks 8–9: test, evaluate, iterate
Peer testing against the original needs statement, then one modification and a re-print for those who need it.
Week 10: present and reflect
Folio submission and a two-minute pitch.
The design brief
Constraints are what make this printable. Give students this:
Design a device that solves an identified storage, organisation or ergonomic problem in your classroom or bag. It must fit within 120 × 120 × 50 mm, use no more than 20 g of PLA, print without supports, and include at least one surface that mates with an existing object you have measured.
The "no supports" rule teaches overhang and orientation. The 20 g cap keeps the print queue honest and the budget flat.
Assessment ideas
- Design folio (40%) — needs statement, measured sketches, two alternatives with justification, slicer settings log, evaluation against criteria.
- Prototype (30%) — dimensional accuracy against the student's own drawing, finish quality, fit to the mating object.
- Iteration evidence (20%) — what failed on print one, what changed, what the measured improvement was. Failed prints are evidence, not waste.
- Collaboration and safety (10%) — queue management, machine handover, correct shutdown.
This maps cleanly onto the design-and-production emphasis of Stage 4 Technology Mandatory, and scales up for Stage 5 Design and Technology or iSTEM by loosening the size cap and adding a client. For Stage 6 Engineering Studies or D&T major projects, the same machine becomes a rapid-prototyping tool rather than the subject of the unit.
Safety and sign-off
Be conservative and go through your own process. Hot ends reach well over 200 °C and heated beds sit around 60 °C — both are burn risks, and the A1 mini's open frame means the nozzle is reachable. FDM printing also releases ultrafine particles and VOCs; with PLA the emissions are lower than with ABS, but "lower" is not "none".
Practical measures: site printers in a well-ventilated room, not a sealed store cupboard; keep them behind a bench line or on a high shelf; no student hands on the machine while it is hot; PLA only. A filtration unit is worth costing in if the room has poor airflow. Write it into your school's WHS risk assessment and have your Head Teacher sign it off before the first lesson — we can supply product documentation to attach, but your school's process decides what is acceptable.
The term budget
Filament is the only recurring cost and it is small. A class of 30 doing two iterations at 20 g each uses about 1.2 kg. At roughly A$16–25 per kg at the time of writing for PLA and PLA+, that is under A$30 of material for the whole term — call it A$1 per student. The 10-spool PLA+ bundle will cover a faculty for a year.
Budget separately for consumables that do wear out: a spare textured PEI plate per printer so a finished plate can be swapped and cooled while the next job starts, scrapers, glue stick, and one spare A1 mini hotend in the cupboard. A blocked nozzle in Week 7 should be a 10-minute fix, not a three-week freight delay.
What to buy
- Three × A1 mini — the core classroom fleet. Three machines, one material, one workflow.
- One × A1 mini Combo (optional) — add multi-colour on one machine for exemplars and showcase pieces; keep the rest single-colour to avoid purge waste.
- Filament — the PLA+ 10-pack for bulk, plus Bambu PLA Basic for any AMS-fed machine.
- Spares — one plate per printer, one hotend, one extruder unit per faculty.
- Humidity control — a filament dryer if you're coastal or storing spools over the summer break.
We're in Casula, NSW. That means local warranty handling, spare parts on the shelf rather than on a boat, and someone on the phone in your timezone when a printer stops in Week 8. Orders placed before 12 pm dispatch the same business day (shipping rates are quoted at checkout).
Schools: request a formal quote or raise a purchase order on our Schools & STEM page — you'll also find the Starter classroom kit there. If your school buys regularly, apply for a trade account for NET30 terms on an approved account.
