Fourth graders spent the morning last Thursday at Central Rock Gym in Watertown, learning to rock climb at the indoor gym. This is part of the Grade 4 P.E. unit that teaches life skills to students. Every grade at Tenacre has a life skills unit—pre-kindergarten, kindergarten and second grade learn to ice skate. First graders learn to ice skate, too, but also learn to ride a two-wheeler. Third graders hike Blue Hills; fifth graders learn to cross country ski; and sixth graders learn to kayak and canoe in the Charles River.