Classroom Clean Water Challenge Kit

What is included

• Filter housings and collection vessels for multiple groups working at once
• Bulk graded media: gravel, coarse and fine sand, filter wool, activated carbon
• Standardised muddy-water mix so every group starts from the same sample
• Turbidity comparison cards for each group
• Measuring cups and a group timer card set
• Class set of printed challenge sheets, planning frames and scoring sheets
• Teacher guide with setup, timing, group roles, cleanup and troubleshooting

How the challenge runs

1. Every group receives an identical dirty-water sample and the same constraints
2. Groups plan on paper before touching materials
3. Build, test, and score clarity against the comparison card
4. One redesign round — change one thing, retest
5. Groups present the change they made and the evidence it worked

You will also need

• Tap water and jugs
• Trays or a sink area, and paper towels
• 45–60 minutes for the first round, plus 30 for the redesign

Safety

Shipping and returns

• Ships to: United States
• Processing time: stated at checkout before you pay — this is the time before the parcel leaves us
• Transit time: shown separately, and it is an estimate from the carrier, not a guarantee
• You receive a tracking link by email when the parcel ships
• Returns: 30 days from delivery, unused and complete, with a return authorisation. Full details, including who pays return postage, are in the Shipping & Delivery Policy and the Refund & Cancellation Policy.
• Damaged, wrong or missing items: contact us and we will put it right — replacement or refund, your choice.

Common questions

How many groups does it cover?

It is sized for a typical class in small groups; the exact group count is on the pack and packing list.

Can we top it up?

Yes — the media and dirty-water mix are the consumables. Contact us about refills.

Is there a matching lesson pack?

Yes — the Clean Water STEM Challenge Pack.