Keep the jobs separate
- Method: what you did, so someone else could follow it.
- Results: what you observed, without explaining it yet.
- Discussion: what the results mean for the aim, including limits and comparison with expected theory.
The usual miss
The discussion repeats the results in words. Add a claim: did the result support the aim, and what could have distorted it?
Do not invent data. Review the report you wrote with the lab report checker.