Also on these boards
Mind you, if you're a Drawing student and you learn how to perceive negative-space, and you take into consideration your format (maybe by using a viewfinder) these will come naturally. But remember "Form follows function," and good design should 1) Capture attention 2) Hold attention and 3) Direct Attention and your compositions will have impact and be effective.
Pattern: Pattern uses the art elements in planned or random repetitions to enhance surfaces of paintings or sculptures. Patterns often occur in nature, and artists use similar repeated motifs to create pattern in their work. Pattern increases visual excitement by enriching surface interest.
questions about elements - How much do you remember? This site has quite a few resources for quizzes /tests/ lessons etc