1. Graduate School, Universitas Negeri Yogyakarta, Jl. Colombo No. 1 Yogyakarta, Yogyakarta, Indonesia
2. Department of Electrical Engineering Education, Universitas Negeri Yogyakarta, Jl. Colombo No.1 Yogyakarta, Yogyakarta, Indonesia
3. Department of Mathematics Education, Universitas Negeri Yogyakarta, Jl. Colombo No.1 Yogyakarta, Yogyakarta, Indonesia