Did you type a connection that was correct but not get the points you deserved? If so, sorry. The system isn't perfect. Do give yourself the extra points mentally. (There's probably no need to comment about this, unless it's constructive.)
Krista: Too easy-done in 30 secs,no cross-over clues. the only line name I got wrong was because they should be written RE,IT,DT,PE (IMHO.) (3 hours, 15 minutes ago)
Sophie: Basic (1 week ago)
Curious cat: Not a single red herring. Groups solves themselves for the most part. (1 week, 5 days ago)
lorna: this was an easy, not medium. Bit boring I'm afraid, no game play to it. Good variety of subjects though. (1 week, 6 days ago)
ScarletFish: Agree with previous comment. Groups were easy to separate. But I only identified Christmas...
Crossovers/red herrings always add interest and complexity. (1 week, 6 days ago)
a: I'd say the groups are too easy to guess without figuring out (i.e. there's only four names, and four two-letter abbreviations), and the school subjects should be capitalised... try to make some overlapping items later, e.g. you could have had "Carol" as a person so there were five possible Christmas items, or had an abbreviation group with an "X" so the particles/rays weren't so obvious, or put in singers with "Oxide" or "Neutrino" who look like they're in the particle group... otherwise good quiz! (1 week, 6 days ago)