Making Polyurethane foam: Could someone please tell me where I can find instructions for a Year 11 chemistry prac for making polyurethane foam?

Making Polyurethane foam: Could someone please tell me where I can find instructions for a Year 11 chemistry prac for making polyurethane foam?
Mercury Thermometers: how do we dispose of mercury thermometers?
Making ionic compounds: I need help to understand the products we ended up with when we ran this practical.
Enzyme preparation for experiments: Could you provide guidance in the correct preparation of enzymes such as trypsin, pepsin and amylase for enzyme digestion practical activities?
Scientific dictionaries: Can any one recommend an affordable scientific dictionary for use with Years 7–10 students?
Many thanks.
Reflux and distillation: How should solutions be heated when using quickfit apparatus to perform reflux or distillation? Are Bunsen burners still allowed? We do not have any heating mantles.
Organic waste: Students are investigating the reactions and properties of organic compounds from Heinemann Chemistry 2 VCE units 3 & 4.
This online resource investigates fault lines and earthquakes.
potassium bromate: I am wondering if it is safe/acceptable to order potassium bromate in solid form for a visually impressive science reaction for open day purposes.
Esters – preparation, properties and disposal
This is a combination of several questions