I was ill and off of collage when we made pleats so I’ve researched them instead so I won’t fall behind.
A box pleat is formed when two equal folds of fabric are folded away from each other in opposite directions on the front of a piece of fabric.

An accordion pleat is a series of permanent folds of equal width in alternating opposite directions.

A knife pleat is used for a decorative finish. The pleats are folded much like an accordion with an equal amount of space from top to bottom.

An inverted pleat is a pleat formed by bringing two folded edges toward or to a centre point on the outside of the material to form a box pleat on the inside.

Sunray pleats are bias cut knife pleats that are narrower at the top than the bottom. This produces a flared effect.
