Complex sentence: Antecedent strategies are supported by empirical evidence to operate implicitly within classroom environments, and antecedent-based interventions have been supported by research to be preventative, and they produce immediate reductions in problem behaviors.
Split into simpler sentences: Antecedent strategies are supported by empirical evidence to operate implicitly within classroom environments. Antecedent-based interventions have also been supported by research to be preventative, and to produce immediate reductions in problem behaviors.