Parents have until Monday June 30 to register their children for the Redbridge 11+ test.
Children looking to apply to Ilford County High School for boys and Woodford County High School for girls need to register to take the test before the 5pm deadline.
Both grammar schools are holding open evenings to allow prospective students to visit.
Ilford County High School will hold itrs open evening from 6.30pm-9pm tomorrow and Woodford County High School will hold its on Thursday from 6pm-8pm.
Parents can register their children for the test online at www.redbridge.gov.uk where they can also find more information on the test and catchment areas.