rig·or·ous[rig-er-uhs] Show IPA
characterized by rigor; rigidly severe or harsh, as people, rules, or discipline: rigorous laws.
severely exact or accurate; precise: rigorous research.
(of weather or climate) uncomfortably severe or harsh; extremely inclement.
Logic, Mathematics . logically valid.
Not sure the words "harsh," "severe," and "extreme" are the ones I would want to associate with my curriculum.
Words matter, so choose them carefully.