Teachers already know they will be receiving the questionnaire via computer. Nonetheless, there are numerous details that need to be explained. You decide to e-mail all teachers a cover letter that explains the questionnaire and provides the Internet link (that is, the URL) and access information. This letter reiterates the purpose and importance of the questionnaire, summarizes the commitment to confidentiality, and notes the incentive of the random drawing for the encyclopedias. Also emphasized is the fact that to be sure their questionnaire responses have been successfully submitted, they need to receive a confirmation message by e-mail. In addition, the letter states whom the teachers should contact if they need help. You also give them the option of requesting a paper copy of the questionnaire.