Use the ran# key on your calculator to chose a sample of 8 pupils from a year group of 100

I don't think that the web2 calc has a random number generator - it may have but I can't find it.

I think many calcs generate a random number between 0 and 1

I would multiply this generated number by 100 and round it off to get random integers between 0 and 100.

I suppose if you get zero you could ignore that one