Buy one, get one half price! Two complete lessons for a discounted price! Guide students through the complex world of science with this easy-to-use, teacher- and student-friendly resource. These lessons target NGSS 5-PS1-1 and NGSS 5-PS1-2: Matter and Its Interactions. Included are all the pieces for you and your students, including investigations, informational text, vocabulary activities, extension activities, and evaluation options.