5 Valid answers to all questions. Several generalizations, or at least one excellent generalization. Writing is very clear, perhaps even motivating.
4 Valid answers to most questions, including to all straightforward questions. Some attempt at generalization or summarization of results. Writing is very clear.
3 Strong evidence of having done all the experiments correctly. Valid answers to straightforward questions. Writing is easy to read.
2 Strong evidence of having done all the experiments correctly. Writing is readable, perhaps with some difficulty.
1 Some evidence of having done the experiments, possibly incompletely or with some confusion.
0 Minimal work.