For drawing questions, there are some things to be aware of to ensure that your answers are graded properly.
When drawing stereoisomer structures with wedge-and-dash bonds, the skinny end of the wedge bond must point towards the chirality center (asymmetric atom). Note: Our style is to always point the skinny end of dash bonds toward the chirality center. This style may differ from what you have seen in your textbook.
Also, if a chirality center contains a hydrogen atom, then the hydrogen must be drawn to ensure proper grading. In addition, the order of wedge, dash, and normal bonds around the chirality center can matter for grading.