Stem S.T.E.M. Pentomino

A pentomino is a shape made from five identical squares fixed together at the edges, in varying orientations. In this puzzle, you're given 12 pieces that can fit together into one larger rectangle, leaving no gaps. Forming that rectangle is your first challenge! Then use the same 12 pentominoes to tackle the 40 challenges on the enclosed cards and see how you "shape up"! Initially, fiddling with the forms may be confusing, but look at them from the right angle and everything will fit together nicely!