Are the books mentioned appropriate to teach kids aged 13-14? I know As Siraat have got a Sirah Essentials collection but think these are for younger kids. They are really well designed too.
Try Allama Abdul Mustafa Azmi's "The Prophet of Islam" (translated in English by Maktaba-e-Qadria, Bolton). As-Shifa translated by Aisha Bewley is another option. I'm not sure if either of these is available online.
is there a book, preferably online, which can be read in 12 days if it is taught 45 mins a day? i'm looking to do a seerah class from 1-12 rabi al awwal. i liked aH's light of sight but maybe that is too short and will not take 9 hours to cover.