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Computer Organization and Design (COD) is a fundamentally required early-stage undergraduate course in most computer science and engineering curricula. During the two sessions (lecture and project part) of one COD course, educational platforms play an important role in cultivating students' computational thinking, especially the ability of viewing the hardware and software in a computer system as a whole (computer system thinking ability for short in this paper). In order to improve teaching quality, in this paper, we discuss the deployment of an inexpensive in-house Field Programmable Gate Array (FPGA) cloud platform, which can provide students with hardware-software co-design methodology and practice. The platform includes 32 FPGA nodes and the scale can be dynamically changed. Each cloud node is heterogeneously composed of an ARM processor and a tightly-coupled reconfigurable fabric to …