Thinking in Unique Ways

I want to stress the importance of thinking and learning in my class instead of worrying about a grade.  There is an idea that students, if they have access to excel, can use this program to promote their interest in the topic of math.  Also in my class there is no such thing as a wrong answer going over lessons.  I want to encourage participation and thinking instead of students being shy and afraid to answer questions.  This can be done by creating an open policy in the classroom.