If you're thinking about buying or subscribing to products or services you've seen, you may wish to use the following checklist to help you make your decision. Ask the questions below, perhaps on a form devised for the purpose. Better still, use an online survey because then it will be easy to collate the results in the form of a spreadsheet file. Ask other staff and, where appropriate, pupils to do the same. Obtain an evaluation copy if possible, and seek the views of other teachers.