The standards based lesson plan generator (LPG) is an online curriculum development platform designed to support increased teacher reflection and effectiveness in lesson design and delivery. The LPG guides users through the process of complete lesson design via Understanding by Design, or "beginning with the end in mind" (Wiggins & McTighe, 1998). Users align their students' performance objectives to ACTFL National Standards and, optionally, California State Standards, and/or Common Core Standards. The LPG also prompts users to incorporate performance assessments, including interpretive, presentational, and interpersonal modes, and allows for the creation of assessment rubrics, use of 5-step Lesson Plan structure, and inclusion of attachments and multimedia. LPG users can now collaborate on lesson plans or thematic units, as well as clone model lesson plans to make them their own. The LPG is an ideal tool for language teaching methods courses, teacher professional development workshops, curriculum modification initiatives, and more.