Students look for extra credit work from their teachers. Teachers vary in their view of extra credit.
Some teachers look at extra credit as a burden to be assigned and graded. These teachers feel that students should do the required work and do it well. They have constructed a curriculum that they feel will give students everything and all information necessary to become competent learners in their classes.
Other teachers use extra credit to broaden the scope of their curriculum. Some feel that the extra credit gives students a boost and will help improve grades. Others feel it builds good relationships with students. The teachers who use extra credit do not see it as a burden and are happy to correct it, give credit and hep students achieve well.