Depending on settings in your Acrobat Reader program and on your computer for the size of your monitor, these pdf files may display smaller or larger than you expect. To change their size on your screen, try adjusting the zoom settings for Acrobat Reader. They should all print out as full-sized 8.5 x 11 pages regardless of the size you see on the screen.
If you need Adobe Acrobat Reader, you can click Get Adobe Acrobat Reader to go to Adobe's web site where you will find links to Reader.
If you don't have Powerpoint on your computer, you may find some helpful information about free Powerpoint viewers here.
Click here to see some of Dr. Jean's titles published by Scholastic and other great book houses.