ˈiːtʃ æktˈɪvᵻɾi hɐz ɐ vˈɛɹiɪŋ nˈʌmbɚɹ ʌv klˈæsᵻz, bˈeɪst ɔnðɪ ɐmˈaʊnt ʌv pɑːɹtˈɪsᵻpˌeɪɾɪŋ skˈuːlz ænd ðə nˈeɪtʃɚɹ ʌvðɪ æktˈɪvᵻɾi.
Each activity has a varying number of classes, based on the amount of participating schools and the nature of the activity.