I will do some preparingprepare some work abouton those topics, but when we actually discuss them I will talk about those issues just loosely based on thoseat prepared work, but not exactly according to themnot following it exactly.

"preparing work" is not correctly, you could say "preparatory work" but this is quite formal. I don't think there is enough difference between the meaning of the phrases 'based on' and 'according to' to get enough contrast, so I used 'loosely based on' vs. 'following exactly' to make it clearer. 'Work' is a mass noun so you should use 'that work' not 'those work'.

When I first talked to you, I was awarethought that you must behave been a teacher sometime agoin the past because I fcould seel you really have goodhad a lot of teaching experience.

OR because you gave me such a great learning experience.