Rob DuToit is teaching an online art history course on Tuesday, January 26th, at 10 a.m. to noon via Truro Center for the Arts at Castle Hill. The topic: landscape painting from ancient times through impressionism. Registration is pay-what-you-can at castlehill.org. Also on Tuesday, January 26th, Catherine McCarthy leads “Keeping the Flow,” a monthly crit group for visual artists. The group meets virtually on the last Tuesday of each month, 4 to 5:30 p.m. Registration is $450.