Having decided to use an attitude questionnaire the following need to be considered 1. Picking other folks brains is always useful, this is one of the jobs of the network. You could use Likert or Semantic-Differential scales but whatever you choose must be appropriate and easy to make up. This is especially important if you are using the Likert scale. The more ideas the better, pupils and colleagues can be asked to contribute.
Worked examples help the people who are going to fill in the survey.
There is no point in spending time on collecting data that means nothing. It is always a good idea to pilot your survey with a small group, it helps to iron out some of the problems. The sample size must be big enough especially if you are going to subdivide into say boys and girls. You should be getting similar answers to similar questions. These scales will give you negative and positive attitudes.