Aashpreet, you are right that prévoir does not conjugate the same as 'voir' (or revoir) in future tense. 

Probably worth noting in the lesson that 'related' or ‘derivative' verbs don’t necessarily follow the pattern discussed, even though the lesson notes that it is on the irregular voir and envoyer. 

See for instance ‘convoyer’ in future tense also - different to 'envoyer'.

Not sure every variation in verb conjugation needs a lesson though - acquiring the different and irregular verb conjugations as you encounter them, is part of ‘the syllabus’ of French.

https://www.wordreference.com/conj/frverbs.aspx?v=prévoir

 https://dictionnaire.lerobert.com/conjugaison/prevoir

 https://www.wordreference.com/conj/frverbs.aspx?v=convoyer

Salut Aashpreet,

https://progress.lawlessfrench.com/questions/view/prevoir-vs-organiser-planifier

Have a look at the above link  --  I hope it helps, otherwise, try an online conjugator -- there are many to choose from.

https://leconjugueur.lefigaro.fr/conjugaison

Bonne journée

Jim