1. Be careful of toxic compounds.

This website is a brief introduction on toxic substances, posted by the Department of Health of the New York state. This might look very boring to read, but when you must do many laboratories in chemistry, it is more than important to be able to make the difference between a toxic substance and a safe substance. Effectively, the main reason is for your own safety and the safety of your colleagues, but if you want to eventually do research about new compounds, for example, to create a new medicament, then you must avoid toxic substances to not kill your patients! Therefore, this website is extremely useful for natural sciences students because it indicates many toxic substances, their different substances and how to know if a substance is toxic only by looking at it. To summarize, this website will tell you all that you need to know about toxicity and their effects on people's health while you are studying in a Chemistry class.

2. Learn how to use a microscope.

This website is a very nice tutorial, posted by the company Home Science Tools, that shows how to use a microscope. Students in biology will quickly understand while reading theory books that humans are only one species from millions of others. Also, most of these species are way too small for humans to be able to observe them with only their eyes. This is why it is very important for students to be able to use a microscope, since they will need to identify a lot of very tiny creatures, and they won't be able to do it if they do not understand well how this engine works. Therefore, I strongly recommend this website because it shows how to use a microscope step by step. It also shows a picture with all different parts of the microscope indicated. To summarize, this website must be consulted by all natural sciences students to increase their chances of success.

3. Learn about how uncertainty works.

In every laboratory class that natural sciences students will assist, they will have to take different measures. But, all engines that will be used have a different uncertainty, which means that every engine, by example a multimeter, does not necessarily show the exact value of the measure you are looking for. For example, if the number given to you is 51, then the real and exact value of the number is something between 50 and 52, since their must be an uncertainty of 1 in your measure. All teachers will ask their students to include all uncertainties in their calculations. Therefore, I strongly recommend every student in natural sciences this website, posted by Chemistry LibreTexts. It describes Heisenberg's Uncertainty Principle. To summarize, this website learns a lot about how the uncertainty principle works.