All of the lecturers agree that it is essential that ...
the students participate in the contest are given trainings first
the students to participate in the contest given trainings first
the students participating in the contest be given trainings first
the students participating in the contest being given trainings first
Subjunctive That Clause
Essential that + S + P (bare infinitive).
Bandingkan pilihanmu dengan sobat pembelajar yang lain.