A delegation of PTA Association led by its President Harish Thakur and Vice President Amit Mukhiya called on Chief Minister Jai Ram Thakur here today and thanked him for giving in-principle approval for regularization of the services of PTA, PAT and PARA teachers serving in various government schools.The delegation said that this would benefit about 6500 PTA, 3300 PAT and 97 PARA teachers of the State.