Her father was a descendant of British painter John Frederick Tennant and he painted with watercolor and oils in his free time.
[5] As a high school student, Tennant enrolled in classes that were provided by the Texas Art League, where she studied with Gaetano Bianchi, the first sculptor to teach her, and Kunz Meyer Waldeck, an internationally known artist from Germany.
One of its programs was the Treasury Department Section of Painting and Sculpture, under which the federal government commissioned artists to create art for a variety of public buildings, often post offices.
Tennant created a frieze of three plaster reliefs — Cattle, Oil, Wheat (1940) — for the U.S. post office in Electra, Texas.
[9] Tennant was a member of the National Sculpture Society and the Texas Fine Arts Association (now known as Arthouse at The Jones Center).