I am writing these quick few lines for some people in the class, you know who you are:
Please please
STOP PUTTING THE TIP OF YOUR BRUSH IN YOUR MOUTH !!!
Paints and solvents contain all sorts of chemicals. I myself wash my hands every hour or so when I paint. It is important that you don't put your health at risk for carelessness.
Last session three people were chewing on the brushes, one of them paints with gloves and I bet you all go home and wash your fruit.
Also please don't forget to use low odour thinners in class. They have vapour as well but less than other solvents. In my opinion other low risk solvents such as Zest it and Turpenoid are too oily but this is a matter of personal taste. Low odour thinners can be bought cheaper at Jackson's (Putney bridge or online) for about 11£ per litre.