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Jennings Environmental Education Center, Route 528, Brady Township, hosts Take Back the Woods: Battling Invasive Species from 9 a.m. to 1 p.m. April 18. Registration is required by April 10. Homeschool CSI: Journey North will be held on April 9 in two sessions, one from 9 a.m. to noon and one from 1 to 4 p.m.; registration deadline is Monday. Scout Stewards: Battling Invasive Species is 2 to 4:30 p.m. April 19; registration ends Wednesday. The center is open 8 a.m. to 4 p.m. weekdays and on weekends as scheduled. The trails are open daily from sunrise to sunset. Call 724-794-6011.