Extensive reading continuous and Read faster

Today we learned previous lesson that “Extensive reading”.The teacher made the question and we discussed with partners.
- How do you read in English?
- What are obstacles to faster reading? 

 And I think the difficult words and idioms make me confused and take a long time when I read.

I used skimming, scanning and guessing the words in reading.

I think that faster reading was easy but the words were difficult.