Puzzle Time 2

Since our group has finished our puzzle, we have been helping out group three. This group is having some trouble because they purchased a 1500 piece puzzle while the other groups purchased 1000 piece puzzles. While helping out group three, I noticed that they used some different techniques to solve their puzzle. Group three had separate all the similar pieces into different groups and each group member was working on a specific part of the puzzle while using these pieces that have previously been separated.