( Teachers ( ( should ( ( provide ( opportunities ( for ( all students ) ) ) ) ( to ( experience ( many things ) ) ) ) ) . ) )
(ROOT (S (NP (NNPS Teachers)) (VP (MD should) (VP (VB provide) (NP (NP (NNS opportunities)) (PP (IN for) (NP (DT all) (NNS students)))) (S (VP (TO to) (VP (VB experience) (NP (JJ many) (NNS things))))))) (. .)))
Teachers should provide opportunities    for all students to experience many things.
(ROOT (S (SBAR (IN If) (S (NP (DT an) (NN accident)) (VP (VBZ happens) (PP (IN during) (NP (DT a) (NN science) (NN experiment)))))) (, ,) (NP (NP (DT the) (JJ first) (NN thing)) (SBAR (S (NP (DT a) (NN student)) (VP (MD should) (VP (VB do)))))) (VP (VBZ is) (NP (NP (NN report)) (PP (TO to) (NP (DT the) (NN teacher))))) (. .)))