For those who want to learn how to find out more about their ancestry, a four-part class on genealogy for beginners at the Polish Center of Discovery and Learning begins Thursday and will include sessions on April 6, 13 and 20. It will benefit persons of any ethnic background. Although attendance at all classes is not required, it is recommended. A fifth class on Polish genealogy will be offered on April 27. Classes will be offered in two series, one from 10:30 a.m. to noon and another from 1 to 3 p.m. Admission for the genealogy classes is free, but space is limited and registration.