I like the general direction of your design-- please do not take these comments as that the entire thing is completely wrong. You did a lot of things right with it, but there's also a lot that can be improved, and I'm going to warn you in advance that those things are what I'm going to focus on.
There are a few subtly wrong-looking things about your graphics:
- The boxes inside your photo frame don't have a consistent distance, or width. It might be a good idea to make those both an equal width and distance from the border
- Your graphics have different colored backgrounds than the poster-- some of them are more difficult to remove, but the FIRST logo has a transparent background version on the FIRST website.
- The borders on the pictures in the midsection are inconsistent-- and unbalance composition (which might be intentional, but looks really odd)
- Your headings are really odd-- the spacing is off compared to the pictures, and the "lego teams" part isn't a title and doesn't have a bullet point-- try including both FTC and FLL under the same heading
- Use a consistent drop shadow or don't use one at all. In photoshop, this is pretty easy-- you can make a consistent style and then apply it to all the images. This can also fix your border problems.
On a broader design level-- the composition is generally very oddly balanced-- it might be a good idea to choose either a more formal (symmetric) or informal (imbalanced) balance to carry through. Also consider how someone's eye is taken through the composition-- right now, you have one thing that catches the eye immediately-- the logo, which follows down into the picture frame, and then just sort of muddles around the large block of content in the middle. It might be a good idea to simplify that block-- how much of that information is actually being read by passerbyes? What is the ultimate goal of this poster? If it's to communicate what your events are, it needs to focus on that-- not cram it into 1/3 of the composition.
General comments on font choices-- the HP font is really cute, but also really hard to read. It works for the top, but the smaller it gets and the further away you're trying to read it from, the more difficult it is to read-- the font has a lot of visual confusion built into it with the zig-zags and general close kerning. I'd also ask what size this will actually be printed at-- if this is a full-size pop-up display, it's a lot better off than if it's a 36" poster.
As earlier mentioned, the text is generally pretty cramped in and most of it doesn't really communicate much-- am I supposed to know what the "SAVES Holiday Food Basket Giveaway" is? How is this relevant to a judge or passerby? Again, consider the purpose-- which of your events are really impressive and relevant to the judges and passersbyes-- give those more space, and emphasize them. The little stuff can be in a binder, but probably doesn't belong on a display-- you want to communicate to the viewers, not confuse them.
Best of luck, and I look forward to seeing the finished display at Champs!