Abacus Brain Gym expanded to two new locations in January at 8650 Spicewood Springs Road, Ste. 124, Austin, and in the Lake Creek Office Park, 13740 Research Blvd., Bldg. N-3, Austin. The tutoring business helps students boost brain development through mental math exercises. Abacus also closed its location at 9090 Jollyville Road, Ste. 107, Austin, on Jan. 10. Spicewood Springs: 512-775-0454, Research: 512-299-4611. www.abacusbraingym.com