4. Keep your students on their toes.
Every once in a while, provide some sort of tangible incentive to students who arrive on time. For instance, you may offer a small snack. a fun pencil. or a homework coupon. Or, give each student a raffle ticket as he or she enters the classroom. Then, a few minutes after the start of class (just in time for those who have strolled in tardy to see what they’ve missed), collect name tickets, and pull a few winners for fabulous prizes.