Scholastic.com is among numerous websites that offering free resources for English teachers. The "adjectives" lesson plan includes an educational video and printable worksheets. Teach-this.com outlines learning games for teaching English as a second language classes about adjectives.
At Promethean Planet, you can preview and download nearly 200 teaching resources about adjectives. Instructorweb.com provides an adjectives lesson for 2nd, 3rd and 4th grade classes. Printable materials include an instruction guide, a handout for students and a worksheet. For 2nd grade teachers, Cpalms.org presents "Describing Words: A Lesson Plan on Adjectives." The plan includes a writing assignment for students and a rubric for grading it.