The prelabs are working, it wasn't just our site, it wasn't all the 1570 students bringing site-maker down, it was some other issue in site-maker certainly, but the prelabs are now available and working fine as did their ... fix yesterday and re-load, so I hope you can also see them adequately and ... go back to them as needed when you start to do your first real homework set and have to make that histogram or boxplot. 