Isi bahasan : Latent cluster analysis of instructional practices reported by high-and low-performing mathematics teachers in four countries, on using various mathematics intructions versus traditional instruction-an action research, our peospective mathematic teachers are not critical thinkers yet, implementing inquiry-based learning and examining the effects, in junior college probability lessons, undestending of prospective mathematics teachers of the concept of diagonal, sunddanese ethnomathematics : mathematics teachers of the concept of diagonal..