I liked the way they reminded you of key points to remember (which were highlighted in red) every time you got an answer wrong :)(NZHS 25 Oct 09 Subatomic particles)
very helpful made me understand redox much beter, most useful one ive ever done so far on best choice(NZHS 17 Oct 09 Redox equations basics)
Hi, I'd just like to thank you for making this, it's a great way to learn while also being competitive and making studying more bearable.(NZHS 16 Oct 09 Titrations more calculations)
Normally I would run the other way screaming from one of these questions in order to prevent my brain from melting- but setting the questions out like this amazingly makes sense! Only wish there were more to do.(NZHS 14 Oct 09 Applied stoichiometry)
i like the fact that the hints, while not giving yout the answer, allow you to work out how and why something happens.(UKHS 5 Oct 09 Oxidation numbers)
I have got much better at naming ionic compounds. I did really well, with little mistakes. Practice makes perfect!! (US Univ 5 Oct 09 Nomenclature ionic compounds)
it helped me alot with balancing and made me think about new combinations in a whole new view. Thumbs up from me...Good Challenge! :)(UKHS 1 Oct 09 Balancing equations)