I love the colours that have been used here, because even though they are pink, they still appeal to boys. The colours are all really warm, and haven't actually been used that much, even though the colour scheme looks very consistent.
Using circles as a repeating element throughout the yearbook. You could use school colors, color scheme colors. Solid circles and rings. Play with transparency of the circles too. Another Cirle Brochure by Tony Huynh, via Behance