For me, "commitment to teaching students" sounds more like an ongoing commitment (that exists in the past, present and future), while "commitment to teach students" is more like a promised future activity. To me it seems slightly unusual to say that a commitment is "rewarding". Spelling: commi t ment.
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yzh1978So "to" can be either "a prep" or "infinitive"?Preposition in "commitment to teaching students" and infinitive marker in "commitment to teach students".