It's been controversially in the headlines over the last year but Pure is definitely worth giving some attention. It's a course on God's view of sex and relationships designed to equip Christian students to live distinctively for Jesus. Linda presents a gospel-centred grasp of this important topic and you can hear her humour and personality coming off the pages. The original resources were taken offline a while back so they could be republished more professionally. They're now available again: Pure: Sex and Relationships God's way.
Primarily suitable for youth groups, students and young adults but anyone could find it beneficial.