Welcome to the new CLEAPSS Science Website
What is CLEAPSS
CLEAPSS resources give teachers ideas for exciting and engaging practical activities that fire pupils'
imaginations and then, unlike many other sources of ideas, go on to show teachers and technicians in
detail how to translate the ideas into safe and exciting experiences in the classroom.
CLEAPSS advice and documentation is recognised by the Health and Safety Executive and the Department for Education..
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Latest news from CLEAPSS..
Calling all Biologists!
CLEAPSS Guide GL499 – DIY Centrifuge provides a complete, school ready design for a 12,000 RPM centrifuge with interlock, USB power and capacity for standard 1.5 ml tubes. Find it in What's New
The guide includes STL files for 3D printing the enclosure, rotor and handle, a DXF file for laser cutting the acrylic lid, a detailed components list, circuit diagram and fully illustrated assembly procedure. (Additional files found under GL499a)
Product Recalls
CLEAPSS is aware of an issue of Asbestos being present in sand based products.
These are commercially available products rather than a specialist school science/DT product. However, we are aware that some schools may have these products.
If you do have these products you should follow the advice given in the below link.
Copper Sulfate
CLEAPSS has recently received multiple Helplines about incidents with copper sulfate.
This includes situations where pupils are deliberately consuming Copper Sulfate, please ensure you enforce the no eating / drinking rules in your labs and also are aware of how to deal with emergencies.
E-cards : How to deal with lab emergencies
No eating or drinking guidance
Please also review the updated Hazcard before using copper sulfate.
2025 Hazcard updates includes and update to the safety advice for copper sulfate. Hazcard 027C - Copper Sulfate
A quick and safe method for preparing hydrated copper sulfate crystals and beautiful blue crystals may be obtained within 30 minutes.
LabAid
Do you have excess equipment taking up space ?
Or looking to help support practical work ?
Then have a look at the work that LabAid does.
The Practical Biologist - a hands-on biology booklet
We are proud to be part of this from Darwin Biological
New Resource for UK Schools!
Darwin Biological has launched The Practical Biologist - a hands-on biology booklet created with expert partners to inspire the next generation of scientists.
Copies are arriving in 4,500 UK secondary schools this week, and it’s free to view online: www.darwinbiological.co.uk
Packed with practical tips, experiments, and free resources from leading organisations.
Designed to make biology exciting, accessible & sustainable for every classroom.
New Resource for UK Schools!
Darwin Biological has launched The Practical Biologist - a hands-on biology booklet created with expert partners to inspire the next generation of scientists.
Copies are arriving in 4,500 UK secondary schools this week, and it’s free to view online: www.darwinbiological.co.uk
Packed with practical tips, experiments, and free resources from leading organisations.
Designed to make biology exciting, accessible & sustainable for every classroom.
What's new..
All new documents..
PP162 – Comparing the density of stomata in common plants and those adapted to dry conditions
This method compares the density of stomata of mesophytes (most land plants) to xerophytes (adapted to dry conditions) through making leaf impressions.
(2 Sep 2026)
PP161 - Comparing the distribution of stomata on the surface of leaves
This practical procedure offers an entry-level activity comparing the number of stomata found on the upper and lower surfaces of leaves of Tradescantia zebrina.
(2 Sep 2026)
GL508 – Observing stomata
This guide outlines both how to observe stomata using three different methods including direct viewing, epidermal peel, and making a leaf impression. The second half the guide demonstrates how to open.. full details
(2 Sep 2026)
GL363 - Activities using plants
Covers the fundamental activities that use plants, and includes advice on which plants to use and how to keep plants at school.
(2 Sep 2026)
GL488 - Personal Medical Electronic Devices
Guidance on the use of science practical work with person(s) wearing personal electronic medical equipment such as pacemakers or cochlea implants.
(1 Sep 2026)