The before takeoff check is the systematic procedure for making a check of the engine, flight controls, systems, instruments, and avionics prior to flight. Normally, it is performed after taxiing to a position near the takeoff end of the runway.
PHAK Ch-14 (28) Clearing Procedures - Before Takeoff
AFH Ch-02 (17) Before-Takeoff Check
AFH Ch-05 (2) Prior to Takeoff
Cessna SOPM 1-64 Before Takeoff Run-Up Checklist
Cessna SOPM 1-68 Before Takeoff Checklist
Cessna SOPM 1-72 Before Takeoff Final Items
Private Pilot ACS Page 17 Task F. Before Takeoff Check