Didactic cov ntaub ntawv yog ib hom tshwj xeeb ntawm kev qhia ntawv, feem ntau yog pom: daim duab qhia chaw, rooj, cov ntawv teev lus nrog cov ntawv, lej lossis duab, reagents, nroj tsuag, tsiaj txhu, thiab lwm yam, suav nrog cov ntaub ntawv tsim los ntawm cov ntaub ntawv thev naus laus zis. faib rau cov menyuam kawm ntawv rau kev ua haujlwm ywj pheej hauv chav kawm thiab tom tsev lossis ua qauv qhia los ntawm tus kws qhia ntawv nyob rau pem hauv ntej ntawm tag nrho cov chav kawm (pab pawg)