Clinic takes place towards the end of camp. Each camper is allowed to choose his own sports activity to focus on. Each morning after breakfast, campers and counselors get together on Grant Field for a short period of exercise and stretching. Campers then go off and work on the sport of their choice for the remainder of the morning, under the expert supervision of that sport's staff.

Among the sports that Tecumseh offers clinic in each summer are:

• soccer
• tennis
• basketball
• lacrosse
• football
• wrestling
• baseball
• swimming
• track and field

Clinic is offered in almost every sport offered by Camp Tecumseh. During these last two weeks, Tecumseh regularly brings in a wide range of prominent coaches to either help with clinic, or provide special coaching sessions in their sport. Clinic is an event that is eagerly awaited for each year by the campers.

Dan Liebovitz, head basketball coach at The University of Hartford working with campers at basketball clinic in 2000

Guest instructors who have come up to Tecumseh in recent years during clinic include:

• Anson Dorrance, head coach for University of North Carolina Women's Soccer team (18 time NCAA Division One Champions). Anson was also the head coach for the USA Women's National team, leading them to the Women's World Cup championship in 1991.
• Mike Burnett, men's assistant varsity lacrosse coach at the University of North Carolina. Mike is also the all-time leading scorer for the UNC Men's lacrosse team.
• Erik Weihenmayer, a former camper and counselor at Tecumseh, Erik was featured on the front cover of Time Magazine as the only blind person to climb to the summit of the tallest peaks on all seven continents.
• Nick Cook, PGA Golf Pro and son of former Tecumseh camper and counselor Whitney Cook.
• Bill Sautter, PGA Golf Pro and parent of a current Tecumseh camper
• Gary Bucci, assistant varsity football coach at Ithaca College and parent of a current Tecumseh camper.
• Matt Naylor, former professional soccer player, former Tecumseh camper and parent of a current Tecumseh camper.
• Biff Sturla, head coach in the FC Delco Soccer Club and head coach for Harriton High School boys varsity. Biff is President of Lower Merion Soccer Club where he has coached for over 25 years.
• Shawn Griffin, head coach for Hobart College Men's Varsity Soccer Team.
• Dan Liebovitz, a former camper and counselor at Tecumseh, "Lebo" is the head coach for the Hartford University men's basketball team. Before that, Dan was assistant coach for Jon Cheney at Temple University.
• Tony Williams, President of Starfinders' Organization in Philadelphia and long time soccer coach.
• Paul Hines, Head Track Coach at Chestnut Hill Academy
• Brian Dougherty, professional lacrosse goalie and former camper.