Registration is open for summer sessions of swimming lessons in Pella and Knoxville. Classes in Pella will begin Monday. They cost $24 for residents with a pass and $44 for residents without pass. It will cost $30 for non residents with pass and $54 for non-residents without passes for the session. Summer session one of classes are ongoing at the Knoxville Rec Center.The fee is $31.00 for classes. Contact the Knoxville Rec Center to register for session two.