This is a fun card sort/matching activity directly aligned to Next Generation Science Standard MS-LS1-3. It includes 24 cards that can be sorted and matched under the headings of Respiratory System and Excretory System (though I added a Urinary System heading card in case you prefer that terminology). With this activity, students will analyze, discuss, and ultimately categorize each card under one of the two headings. Additionally, students will match vocabulary word cars with vocabulary definitions within the correct category. Once students sort and match the cards, it will be very easy for you to see who has matched the targets and who has not. The cards are currently sorted correctly, so this document can be used as a key (though another is included). Included With Purchase: ★ 26 cards ★ Organizational worksheet with analysis questions (Word file so you can edit) ★ 3 possible learning targets ★ Lesson plan suggestions Visit my store for more proven, high quality resources! Thank you! Please rate and review - tell me how I can improve!