Historian to speak: The main location of the New Orleans Public Library, 219 Loyola Ave., will host Keith Weldon Medley, historian and author of “We as Freemen: Plessy vs. Ferguson” on Thursday at noon. There will be a performance by students from Samuel J. Green Charter school, choreographed by Baderinwa Rolland. Free. Call (504) 596-2560.

‘A day on, not a day off’ concert: United Teachers of New Orleans sponsors a concert featuring New Orleans school choirs and special guests at 6 p.m. Friday at Franklin Avenue Baptist Church, 2515 Franklin Ave., in New Orleans. The evening of song is based on the theme “Remember! Celebrate! Act! A Day On — Not a Day Off.” Choirs come from McMain Senior High School, McDonogh No. 35 High School, O. Perry Walker Charter High School, Sophie B. Wright Charter School, and Lake Area New Tech Early College High School. Free. Call (504) 304-2160.

Jazz Journey Concert: A Martin Luther King weekend celebration featuring Gregory Porter, Barbara Morrison and Warren “Porgy” Jones from 6:30 p.m. to 11 p.m. Friday at the Dillard University Lawless Memorial Chapel, 2601 Gentilly Blvd., New Orleans. Free.

Lift Every Voice and Sing: Audience participation is encouraged at the annual community concert at 5 p.m. Sunday at the Ashe Cultural Arts Center, 1712 Oretha Castle Haley Blvd., New Orleans. Featuring performances by the Rev. Lois Dejean, Golden Voices Community Choir, Michaela Harrison, Troy Henry, Sharon Martin, Monica McIntyre and Deacon John Moore. Free and open to the public; participants are asked to bring a non-perishable food item for the food bank. Call (504) 569-9070.

Lecture at Dillard University: TV and radio host Tavis Smiley and Princeton philosophy professor Cornel West will speak, answer questions and sign their new book, “The Rich and the Rest of Us: A Poverty Manifesto,” at 7 p.m. Monday at Lawless Memorial Chapel on the Dillard campus, 2601 Gentilly Blvd., New Orleans. Free. Call (504) 816-4024.

Film screening: St. Paul’s Episcopal Church, 6249 Canal Blvd., New Orleans, will host a screening of the documentary “Traces of the Trade: A Story From The Deep North,” at noon Monday following 10 a.m. worship and lunch. Discussion follows. Free. For information contact Lee Crean at leecrean@yahoo.com.