The Region One ESC WeTeach_CS Collaborative is a program that will run from January 2, 2018, through August 5, 2018, that will serve teachers who have a desire to challenge the TExES 8-12 Computer Science teacher certification exam and to teach a secondary computer science course or who would like to increase their knowledge in Computer Science in order to improve computational thinking and academic achievement for CS students. The program will provide sustained professional development focused on Computer Science using a combination of workshops, summer institutes, conferences, and online courses. The program was designed in collaboration with partners from the University of Texas - Rio Grande Valley College of Engineering & Computer Science, local high-need school districts, and the Region One Education Service Center. The WeTeach_CS Teachers (CSTs) will participate in a minimum of 60 hours of CS-focused professional development and will be able to select from a variety of trainings including 10 Saturday hands-on workshops, 2 weeks of summer institutes, a multi-week online course, and 4 two-hour webinars in order to meet their individual goals. A total of 30 CSTs will be recruited to participate in the WeTeach_CS Collaborative. All professional development will be geared towards providing the CSTs the necessary knowledge of Computer Science concepts in order to successfully challenge the TExES 8-12 Computer Science exam and teach a CS course. CS Summer Institute trainings will be conducted in conjunction with partnering entities such as Texas Instruments. Much of the provided professional development will consist of hands-on application of Computer Science. The program will be evaluated through the use of feedback forums, surveys, and needs assessments in order to determine the effectiveness of the WeTeach_CS program on supporting Computer Science education in the Region One area.