Use a bound notebook or a secure digital lab notebook
Write your name, project title, and contact information on the cover or first page
Date every entry
Record entries in chronological order
Use permanent ink if writing by hand
Write legibly and clearly
Include the purpose or objective of each experiment
Record the hypothesis or research question
List materials, reagents, tools, and equipment used
Write exact procedures followed
Document measurements, observations, and results
Include calculations, graphs, tables, and figures
Note any changes to the original plan
Record errors, problems, and unexpected events
Sign and date each completed entry if required
Have entries witnessed or approved if required
Reference sample IDs, file names, and instrument settings
Attach or reference raw data and supporting documents
Keep corrections visible and never erase original entries
Store the lab book securely
Back up digital records regularly
Follow your lab, school, or institution’s record-keeping rules