This is the online version of the Oxford English Dictionary. This link goes to the main page. See the box to the right for direct links to OED pages that will help with the worksheet.
If you wish to use some paper versions of the OED or some OED guides, here's some ideas:
Compact Oxford English Dictionary: Complete Text Reproduced Micrographically, 2nd ed. 1991. Reference R 423 O981991 ~ this edition comes with a microprint magnifier
Oxford English Dictionary. Supplement to the Oxford English Dictionary. 1972. Reference R 423 O98SUPP ~ Four volumes published from 1972 to 1986
OED user guides
A User's Guide to the Oxford English Dictionary. 1991. Reference R 423 O981991 User's Guide ~ Ask for this at the Reference Desk
Help with Using OED Online ~ information on the bibliography, abbreviations, and symbols