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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.. (read more)
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Latest news from CLEAPSS..
CLEAPSS - Technicians H&S Self Study Online Course - FREE!!!
We have developed a self-study course for technicians.

We expect this to take 2-3hrs to complete.

This is a FREE course, all you need to do is complete this registration form.

The course is made up of a series of videos and some tasks. .
CLEAPSS ECT Training
Got an NQT/ECT joining your school next term ?

Then sign them up for one of our ECT Course H&S in practical Science for early career teachers

Discover the Fascinating World of Slime Moulds with CLEAPSS
Unlock the mysteries of slime moulds with two brand new guides from CLEAPSS: GL471 Slime Mould and GL472 Activities using Slime Mould.

These comprehensive resources outline what you need to bring the study of slime moulds into the classroom. 

Useful for studying behaviour and growth, GL471 offers expert insight into slime mould biology, care, and observation tips, whilst GL472 features engaging, hands-on activities designed to inspire curiosity and scientific investigation.
CLEAPSS - Teachers H&S Self Study Online Course - FREE !!!!
We have developed a new self-study course for teachers, which covers the basics of health & safety and how to manage practical work and risk assessments in lessons.

We expect this to take 2-3hrs to complete.

This is a FREE course, all you need to do is complete this registration form.

The course is made up of a series of videos and some tasks. There is an option to download / print off the PowerPoint slides used in the videos to enable users to made notes during the course.

Eye protection vs Goggles
Unsure of the differences between Goggles and Eye Protection (safety specs) ?

The read our buying guide which outlines the differences between the two.

What's new.. All new documents..
PP154 - Using Hope’s apparatus to investigate water density
This activity is designed to demonstrate that water reaches its maximum density at 4°C. This unusual behaviour  relates to hydrogen bonding and explains why ponds freeze from the surface down and not .. full details
 (6 Aug 2025)
GL472 – Activities using slime mould
This guide outlines a number of practical activities and investigations using the slime mould Physarum polycephalum, including making mazes, investigating food choices and observing features under a m.. full details
 (22 Jul 2025)
GL471 – Slime moulds
A general introduction on how to grow the slime mould Physarum polycephalum, using two different methods.
 (22 Jul 2025)
GL-478 - Make it guide - A personal hotplate
A hotplate made from a drinks can that can be heated with a cleapss spirit burner
 (15 Jul 2025)
GL057 - Recipe Index
Index to currently published guidance on the preparation of specific solutions and other reagents. Includes a summary Contents List giving the dates of the most recent versions of recipes. Note: this .. full details
 (15 Jul 2025)