These look really nice. Just a few comments: Positive education is about positivity (not math or positive numbers) so I'm not sold on the plus sign on the guy's head. Also in #2 I'm not sure we want to go with a three color design for printing reasons.
Everyone I've shown #13 to seems to love it (myself included)... I would like to see the words a little bolder so they stand out more... also potentially do more with the yellow "face" on the image.
My business partners and I are still deciding but you're in the lead right now. Would it be possible to eliminate the face so it's just the circle? Also, could you try a version with blue instead of yellow? Thank you!
Good news, we're now 100% confirmed that we want to use your design, the only question is around the color. Can you make #53 without the face (we just want the circle) as well as another version with a much brighter/lighter yellow. We also liked the colors in design #106 if you can try a version like that. Finally, if there are any other color schemes you think might look good, I'd love to see them.
As soon as we confirm the color you will be made the winner.