Freshmen and Ice Cream
Invite freshmen to an ice-cream social (hosted by your club or by a group of Christian friends). The college students that did this outreach included a plastic spoon with the invitations they handed out.
To make this event evangelistic, have three or four upperclassmen talk for three to five minutes each on how to make the most of high school. One of them should share their testimony, explaining how knowing God helps us to make wise choices now and for our future. The others could cover areas such as “how to succeed in high school relationally” (ideas on wise dating, purity) and “how to succeed in high school academically” (maybe giving a few study techniques).