Here are some links that should help. Please read them all carefully:
The Nation on single-payer health care
A Doctor's Take on Single-Payer insurance
The Obama Plan itself (as stated by Obama, read to end of page)
The New Republic on Obama's Plan
The Heritage Foundation on Obama's Plan
2 Leading Economists Supporting Obama's Plan
The American Prospect on the current health care system
The AMA's (modest) proposal for reform
A Study of American Health Care System Verse Others Systems
Rankings of Health Care Systems in the World (YOU SHOULD PRINT THIS OUT FOR CLASSMATES)
FactCheck: Do People Wait in Long Lines in Canada for Health Care, and Is it Better?