1956-2006
- 1956 Academia Timoteo was started by Baptist Mid-Missions, Rev. & Mrs. Schwartz and Miss Margaret Tolosa
- 1956–11 students started in 1st grade.
- 1974–Ownership was transferred to IEB from the Mission.
- 1956 to 1980 Miss Tolosa served as administrator.
- 1979–Student enrollment: 175.
- 1979–Purchased 2637 N 4th Street Building.
- 1980–Mr. William Elliott, Headmaster
- 1981–Ramon Tolosa Library Established.
- 1982–Jr. High School Program added.
- 1983–Philadelphia donated property at 303 W. Lehigh
- 1984–303 W. Lehigh occupied.
- 1994–Accreditation by - Middle States Association of Colleges and Schools.
- 1997–New Science Lab & Elevator added to Lehigh building.
- 2001–T-1 Line providing each classroom access to the Internet.
- 2002–PBU opens extension campus at Timothy.
- 2003-4 New Computer Lab and Curriculum Added to the Lehigh building.
- 2005-2006 Dual accreditation by MSA & ACSI
