diff --git a/slides/Alignment_Mapping.pdf b/slides/Alignment_Mapping.pdf
new file mode 100644
index 0000000..8a7a69b
Binary files /dev/null and b/slides/Alignment_Mapping.pdf differ
diff --git a/slides/QC_Mapping_Tutorial.pdf b/slides/QC_Mapping_Tutorial.pdf
new file mode 100644
index 0000000..40f2209
Binary files /dev/null and b/slides/QC_Mapping_Tutorial.pdf differ
diff --git a/slides/Quality_Trimming.pdf b/slides/Quality_Trimming.pdf
new file mode 100644
index 0000000..c6da20f
Binary files /dev/null and b/slides/Quality_Trimming.pdf differ