Num+Sum

Resources and links []

Strengths:

 * Free
 * easily shareable spreadsheets
 * will add more features in the future
 * can see other people's spreadsheets (click on Everyone's Spreadsheets or search by Tags)
 * spreadsheets can be Public or Private
 * only "invited editors" can save changes
 * comments about your spreadsheet can be deleted by you
 * existing spreadsheets can be imported

Weaknesses:

 * invited editors must have Num Sum account to be able to edit
 * Comments could be negative
 * If more than one person is editing at the same time, only the last one saved is kept

Opportunities:

 * ====team sharing of data (progress monitoring, item analysis)====
 * ====Teachers could share various checklist spread sheets for classroom management, lesson planning, etc. ====

**Threats**:

 * opening public spreadsheets can reveal inappropriate content including phone numbers and gambling information

Ideas for the Classroom

 * Students could share information for a group project.
 * Students could create and share spreadsheets with math formulas to solve various "real world" algebra and geometry problems.