Government-funded research indicates the prevalence of substance use in this age group is decreasing. However, anecdotal evidence suggests otherwise.

Previous surveys have been limited by:

• — difficulty recruiting schools;

• — the range of substances included;

• — paper surveys.

To determine whether a secure online survey method improves substance use prevalence data collection in school age adolescents.

An online survey was created following literature review, and assessment of the reliability and validity of existing surveys. A comprehensive range of substances were included. A total of 750 students (11–16 yrs) from a mainstream school in Lancashire completed the survey during a supervised classroom session. Focus groups were conducted with students and teachers.

No technical problems were encountered and survey data was securely transferred to Excel allowing instant analysis.

Teachers felt the survey would be unproblematic to administer independently and found the inclusion of substances such as legal highs, and energy drinks, especially relevant.

Most students completed the survey within the session and reported a positive experience, although some difficulties understanding wording were mentioned. They felt an online survey improved confidentiality (and therefore honesty) and was easier to fill in. However, there was concern about teachers reading their responses.

A secure online survey may be acceptable to both teachers and students, and enables the collection of hundreds of surveys in a short time period. It also improves analysis techniques.

Further analysis of whether there is a teacher-versus-researcher supervision effect on the honesty of student responses is required.

The authors have not supplied their declaration of competing interest.