Your text is very large. I suggest reducing the size significantly - maybe 12-16 pt font? This really helps something feel more professional.
I would also eliminate the borders and reduce the amount of color. Color is much more powerful when it is used sparingly. Like the guy above, I suggest using only a few splashes per page within your product images, and maybe color one text element, nor more. I would also axe the colored text boxes and swoopy arcs. They don’t look bad, but they are another element that can distract from your content, and unless you are really good with graphics and layouts (and few IDers are).
Your pages feel very claustrophobic. I would recommend no more than 3 visual elements per page. If that means more pages, so be it, your portfolio didn’t feel too long so this shouldn’t be a problem.
Don’t be afraid of generous spacing, cropping big images off the page, and eliminating things. This will make it easier for the portfolio reviewer to quickly understand each page.
I think your wall scanner project is presented the best, because you show context. Context is powerful. I would even suggest blowing up the image of you holding it against the wall and eliminating the huge rendering in the front of the page.
Your greener gadgets thing should have more context up front. Ask yourself ‘if I were banned from using text to communicate this story, how would I tell it visually?’ - that will help you understand how to improve your presentation.
I would fix the sketches out of perspective in photoshop (wall scanner) with the distort tool, or overlay and fix them.
I’d suggest 2-3 render images per page rather than 4-5. Think of clever ways to arrange them and crop/fade them so you don’t have lots of borders everywhere.
I would give your speaker a catchy name since it seems like a student project that doesn’t really have a story.
Also, I’d do a quick weekend project or two to replace old student work like the speakers so your portfolio better communicates your current skill level even though you can’t show your NDA work.
Best of luck, your work looks pretty good and well thought out, it’s just the presentation that is the hard part.