This is a report of a community service program for mathematics teachers. This program was held for fostering mathematics teachers’ skills in teaching meaningful through active learning using Google Classroom flat form. The program takes place in the Karanganyar region, Surakarta, Indonesia. The participants of this program were junior high school mathematics teachers from Karanganyar district. They were 28 participants. The workshop was held for three days: two days were face-to-face workshop and one day for the online workshop. There are four main topics for the workshop: (1) active learning; (2) Mathematical Abstraction and Mathematical Skills; (3) Developing Question and Students Worksheet; and (4) Designing Active Learning on Google Classroom. The development of offline and online modules in the workshop was based on the theory of I-CARE model. I-CARE Model comprises of five components: Introduction, Connection, Application, Reflection, and Extension. The module consisted of a package for doing workshop which is: Powerpoint slides for offline and online courses; word documents for explaining the structure of the workshop and the worksheet of the participants; a Google classroom for online activity. Due to the pandemic session, the activities of discussion during the workshop were held on online flat form in Google Classroom.