“…In addition, the low-ability group was given additional learning by holding reteaching so that they can more freely ask questions and repeat material that was still not understood. Thus, these activities provide opportunities for students to engage in discussions, think critically, be brave and be willing to take responsibility for their own learning according to their abilities (Chen, 2019;Xu & Zhang, 2021). Learning mathematics using the ATI learning model emphasizes more on grouping students according to student abilities, encouraging student activity, motivating students to express ideas, encouraging students to think, observe, understand, try, guess, find, and review again (Hardy et al, 2019;Septiana et al, 2021).…”