http://finance.yahoo.com/q/hp?s=AAPL
that does have everything you need. you can't be lazy and expect everything to just be there.
you can work out the move yourself by just finding the difference between the close of each day. you can even plug in the data into a excel sheet, write the formula and fill down.
due to the processes of supply and demand the share price is a result of the bid, for example if the share price is at $1.00, and i place a bid for $1.05 the share price will rise as demand exceeds supply, hence the highest bid price would be the high point of the share price. the highest bid will be the high column. and lowest bid would be the low column, of course this is only valid if someone supplies the demanded shares at the price. your teacher is not going to check it up, so just take the high and low.
remember that the bids are cleared out after the transaction is made, and only unsuccessful bids are carried onto the next trading day. so your probably never going to find past bids, you will only get the current bids in place (in comsec and trading room anyways).
remembering that USA is not just one exchange, its made up of the Dowjones and Nasdaq, so if your looking for the best info for apple you shold go to the Nasdaq website
http://www.nasdaq.com/