How to respond to classmate forum. Let's break down where the student's reasoning went off track and how we can help them see the correct solution. First up, the division method. The student thought that 5 doesn't go into 2 (from 25), so they skipped ahead and divided 5 into 5, got 1, and then subtracted to end up with 20. They then divided 5 into 20 and got 4, giving them the wrong answer of 14. To fix this, I'd start with something visual like 25 counters or blocks. We can physically group them into 5 equal groups, so they can clearly see each group has 5, which shows that the answer should be 5, not 14. This hands-on approach makes it easier to understand that 5 divides into 25 exactly 5 times. Next, let's look at the multiplication method. The student multiplied 5 by 4 to get 20, then 5 by 1 to get 5, and added them together to mistakenly confirm their answer. I'd use an array modelthink 5 rows of 5 objects. This helps them see that 5 times 5 equals 25 in one step, not by adding separate pieces like 54+51. Finally, in the addition