Pre-prepare

some stone[s] were pre-prepared, and also the wood-work of a coffer dam, but, as before stated, work on the shoal was not commenced.

Source: wiktionary

For example, when a few frozen vegetables are used in a food service department, a worker might still be needed to pre-prepare the remainder of the vegetables and by working at a slightly slower preparation speed it might take this worker the same length of time to pre-prepare the vegetables.

Source: wiktionary

I ask all the students to pre-prepare four or five points that will illustrate their argument individually.

Source: wiktionary