Firstly, please excuse me if this post is in the wrong section, I couldn't find any "experimental" physics section. Please note that the template is not used since the questions is pretty much descriptive. As part my course, I have one lab session per week. Its duration is one and half our and the experiments are usually done in teams of 3. We are all required to write log books which will be attested one in the next lab session (one week time). However we are marked on how neat the log book is also on "professional presentation". Now I'm confused; after some research I've found out that a log book should be everything that you do. However during an experiment done in limited time, there is no time to be neat and its impossible to show professionalism with excel graphs and 3D models of equipment; main reason being that computers cannot be used in the lab environment. Therefore my question is that should a log book be written at the same time the experiment is in process or should the data be recorded otherwise (say voice recording) and then entered to the log book in the same way that a lab report is written?