First U.S. flag approved (1818)
Robert E. Lee surrendered to Ulysses S. Grant (1865)
Margaret Peterson Haddix born, 1964
President Johnson signs the Civil Rights Act, 1964 (1964)
Garth Williams born, 1912
Aviator Wilbur Wright born, 1867
Scientists Marie & Pierre Curie isolate radium (1902)
Barbara Park born, 1947
Zipper Day (patented by Gideon Sundback in 1913)
Also see our other April Lesson Plans, Thematic Units and Activities
Astronomy Week (1st week)
Week of the Young Child (1st week)
National Library Week (2nd week)
National Wildlife Week (3rd week)
Autism Awareness Month
International Guitar Month
Keep America Beautiful Month
Math Education Month
National Child Abuse Prevention Month
National Frog Month
National Humor Month
National Garden Month
National Poetry Month (Also visit TTC Poetry Unit)
Stress Awareness Month
National Turn Off the TV and Read Month
National School Library Media Month
National Youth Sports Safety Month
Additional Earth Day & Arbor Day Sites
Browse through our Earth Day activities, lesson plans & resources. You will find a complete thematic unit!
The Teacher's Corner Earth Day Resources page.
The National Arbor Day Foundation Tree planting and environmental stewardship non-profit membership organization, programs include Tree City USA, Conservation Trees, conferences, youth education, and Arbor Day Farm.
Arbor Day We are a non-profit organization poised to distribute millions of trees nationally. Check us out!