tʊ ɐdɹˈɛs ðɪs daɪkˈɑːɾəmi, hiː ˌɪntɹədˈuːst ðə nˈoʊʃən ʌv pˌɛdɐɡˈɑːɡɪkəl kˈɑːntɛnt nˈɑːlɪdʒ ðæt ɪŋklˈuːdz pˌɛdɐɡˈɑːɡɪkəl nˈɑːlɪdʒ ænd kˈɑːntɛnt nˈɑːlɪdʒ, ɐmˌʌŋ ˈʌðɚ kˈæɾɪɡɚɹiz.
To address this dichotomy, he introduced the notion of pedagogical content knowledge that includes pedagogical knowledge and content knowledge, among other categories.