This is false! a flash card is there to help you learn a concept if you fill it up just to make it full it may give you information that is false and make you fail when someone asks you the question and you answer what you learned from that card
To improve a conclusion, a writer must bare in mind that it should not address a new topic, that is to say, it has to be a recompilation of the topics already mentioned and developed in the paragraphs, so it has to be a kind of "summary", an overall of the topics and ideas discussed. It should be concise and the reader needs to be know it is the conclusion and you are not going to keep on working on the ideas, so sometimes, it is necessary to include the words "to conclude"/ "to round up"/ "in conclusion" or something similar on order to let the reader know you are about to finish.
I need a pic so I know what the story is