Definitely an area not explored and needing a boost! My concern as a teacher is finding other teachers to pledge money to me for nothing in return. Once the field trip resource is created, can it be used with or without the pledges? If the pledge amount is not met does the resource disappear? Is the resource created before or after the pledging begins? If I set my own challenge, who determines if it is complete? Do you simply rely on the crowd to determine it worth? I do like the idea of teachers sharing their ideas, you have obviously started me questioning how this could work! Thanks.