CLEAPSS Supporting practical science and technology
CLEAPSS Physics
Physics – Let's get it working!

CLEAPSS provides advice for teachers, technicians, science advisers and H&S officers on all aspects of physics practical work - We know that physics experiments can be tricky to set up and get working. If you’re stuck get in touch by e-mail or 'phone and we can help! We also have suggestions for low cost 'make it yourself' equipment – recent examples include, a Planck’s constant LED array and a mobile phone spectrometer/microscope.

CLEAPSS also works with science equipment suppliers to ensure that their products are safe and suited to the physics classroom.
Sparks from Kelvins Thunderstorm

Latest news from CLEAPSS..
Updates to Guide L093
We are working hard to get the new edition of L093 and GL114 finalised and uploaded to our website as soon as possible.

A number of developments have occurred during the rewrite including, most recently, agreeing an interpretation of the transport regulations with ONR. 

We felt it would be unwise to upload a version, only for it to be superseded a few weeks later. 

We aim to have the latest version as soon after half term as possible.
CLEAPSS at the ASE Conference 2024
Thanks to everyone we met at the ASE Conference in Northampton.

You can also see a showcase video reel here.

You can find links to all our conference resources here.

Supply of chemicals - New Regulations

The regulations for supplying explosives precursors and poisons was updated on 27th September 2023 and came into force on 1st October. These put in place new requirements on the supply of certain chemicals which include the following commonly used in schools:

Explosives precursors: acetone, aluminium powders, hydrochloric acid, hydrogen peroxide, sulfur and sulfuric acid.

Poisons: ammonia, phenols, sodium hydroxide, sodium nitrite and sodium hypochlorite solutions. 

The regulations state that businesses and professional users should be verified by the supplier every time a new purchase is made of these regulated chemicals. 

 Where they are being supplied frequently or on a routine basis to the same professional user or business, verification should occur every 18 months or whenever there is a change or deviation from normal purchasing patterns. This is something suppliers can choose to do, but given schools don’t generally make frequent purchases of these chemicals, it is likely that the information will be required for each order.

The person making the sale (the supplier) must obtain the following from the business customer (i.e. the school):

<!--the business customer’s name and address. If the business customer is not an individual, the name of an individual who is authorised on behalf of the business customer should be recorded;

<!--a form of photographic identification of the business customer or, if the business customer is not an individual, of the individual making the purchase; this could be a school photo ID card

<!--a statement of the nature of the business customer’s trade, business or profession, or of the public function that the business customer performs; and the business customer’s VAT registration number, if the business customer has such a number

Your school will have to decide who is authorised on behalf of the business to make the purchase (the name on the order must match the individual). For schools it is most likely to be a technician, head of science or finance manager.

There is no licence which applies to these regulations, so there is nothing schools will need to apply for.

This information should be provided when requested by the company making the sale, there is no need to provide it in advance.

Further details including a list of the regulated substances and concentration thresholds can be found in the Explosives precursors and poisons: general guidance on the government website  

New edition of CLEAPSS guide GL016
We have just updated CLEAPSS Guide GL016 - Technical justification showing how L93 risk assessments meet the suitable and sufficient requirements of the Approved Code of Practice L121.

This revised version contains an additional table in Appendix 1 - that lists the dose rates at a range of distances for all the sources currently listed in L093.

The HSE have indicated that they will expect the RPS (schools) to have a copy this version and be aware of the dose rates for the sources in their school.
Heads of Science Training
Are you a head of science / subject / dept ? 

Not sure on how H&S law applies to you and your team ?

Then our H&S Course for HoD is ideal for you, find all the details here
Physics Resources
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Free resource Click to download Document.
A portfolio of designs of school science laboratories, by Andy Piggott for the ASE

Members only resource Click to download Document.
A straightforward investigation using simple equipment which will allow students to confirm Boyle's law.

Members only resource Click to download Document.
This leaflet is intended to give brief details only of the major manufacturers and suppliers of electronic balances suitable for use in science within secondary schools and colleges.

Members only resource Click to download Document.
Outlines the work that science technicians do, the tasks which they should not, ideally, be given, and provides a pointer to the number of technicians needed in a department and to management issues w.. more

Members only resource Click to download Document.
This includes all the pictograms required by the Globally Harmonised System for chemical hazard labelling. A selection of large (A4) and small sized pictures for printing and use in schools

Members only resource Click to download Document.
Straightforward advice on how to make sure your practical lessons work as you intend. Includes planning and preparing the activity, managing students, timing and equipment, and clearing away. Also inc.. more

Members only resource Click to download Document.
A rather technical publication intended predominantly for manufacturers of radioactive sources and school employers.

Members only resource Click to download Document.
An activity that introduces primary aged children to power packs and how to collect and record data to make a conclusion about the strength of an electromagnet.

Members only resource Click to download Document.
Disposal of waste sealed sources by the grout/dustbin route.

Members only resource Click to download Slideshow.
A training pack for tutors/mentors working with trainee and early career science teachers: Main presentation.The development of these resources was supported by funding from the Gatsby Foundation.

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