hi Marnie! i rejected IXL based on the timed-stuff mentioned above for our DD who learned pretty much nothing but perfectionism at school last year. she loved Dreambox for a while this summer, but we were really only using that to figure out if she had any gaps before starting homeschool (on Monday!).
but all that said, Mathletics is her true love - weirdly, i don't see that one mentioned here a lot. i like it because it doesn't have a million repetitions and will let DD skip to the test if she feels ready, which is a nice way of letting her take control of her own readiness. it also offers easier/harder options in case one area needs an adjustment - it's clear she's getting a lot out of it.
