A 9-page packet comes with 24 cards that have pictures and informational text about each object in the universe. From nebulae to dwarf planets, objects we see—or don't see—are represented in the cards through pictures and words.

Chemistry classes will appreciate this color-coded, single-page reference sheet for The Standard Model of particle physics. It is divided into two main sections: elementary particles and compound particles, both with their antiparticles....

Here is an excellent reference list of over 60 recommended book titles for early readers, each of which includes the author, title, number of pages, and brief summary.