You should not assume, though, that this organization will serve all your laboratory reports. In other words, one organization does not "fit" all experiments. Rather, you should pay attention to the organization requested by your instructor who has chosen an organization that best serves your experiments.
A cornerstone of scientific experimentation is that an experiment can be repeated by other investigators and the same results achieved. In order to make this possible, a written record of the experiment must be kept including the analysis of the data, observations, inferences and/or conclusions reached. Anyone reading your lab report should be able to reconstruct your experiment precisely in its entirety.
These major categories (I – V) are required in all lab reports.
So should anyone else reading your notebook, for that matter. That way, if you make some amazing discovery, like blue aspirin is better than white aspirin (btw: don't eat anything in, from, or created in lab to see if this is right), you will have a permanent record of it to remind you of your greatness. There are three basic parts to a lab report: , , and . In this document, I've written some helpful tips that might help you through your lab-report woes. I won't include everything you have to do (you should look on for the report guidelines), but just a few key ideas.