Gallup.com and RasmussenReports.com both publish approval and disapproval polls about President Obama. The approval ratings on Gallup.com include a most recent weekly average approval percentage, term average approval percentage, lowest average week percentage and highest average week percentage.
Gallup.com also provides and average approval rating for all presidents from 1938 to 2015.
Rasmussenreports.com posts a daily approval and disapproval rating Monday through Friday every week. Under the daily post with current issues and approval ratings, the viewer can find two line graphs. The first line graph shows a total approval line graph that spans a number of years, while the second line graph shows a comparison of total approval and disapproval ratings.