The Butler County Red Cross is offering the following preparedness classes at its office, 312 Mercer St., in April:

9 a.m. to 4 p.m. April 20, adult and pediatric first aid/CPR/AED

9 a.m. to noon April 20, adult CPR/AED

To register for a nearby individual class or to schedule private group instruction, call 800-733-2767 or visit RedCross.org.

The Butler YWCA Montessori preschool program will host an open house for new and returning students from 10 a.m. to noon April 15 at the school in the Monarch Building, 100 Brugh Ave.Morning and afternoon sessions are available for the four-day and three-day per week programs.For more information, call 724-841-9307.

JEFFERSON TWP — Concordia Haven Retirement Apartments and Northwood Realty Services will present “Preparing Your House for Sale” from 10 to 11:30 a.m. April 18 in the Haven I Dining Room, entrance 2A, 112 Marwood Road, Cabot.Realtors will guide participants through the process and discuss downsizing.Tours of Haven I will be available. A light lunch is included in this free event.Call 724-352-1571, Ext. 8560, to register.