The survey software has a number of built-in controls to assure completeness and interpretability, and therefore produces cleaner data than a paper questionnaire. These include required fields (items that must be completed), defining the number of possible answers (e.g., not allowing more than one box to be checked for an item), and automatic skips (taking the respondent to a particular item based on a previous answer). Because teachers in this project opted to complete the questionnaire on the computer, you don't have to check any paper questionnaires. However, you do look closely at the questionnaire database on the Web hosting site as a prerequisite for your own data analysis. Specifically, you check to see if the frequencies for the quantitative items make sense, if the missing data are at a minimum, and if the teachers' open-ended responses (which they typed in) are understandable.