diff --git a/sketchnotes/lesson-3.png b/sketchnotes/lesson-3.png
new file mode 100644
index 00000000..f6c9e8e8
Binary files /dev/null and b/sketchnotes/lesson-3.png differ
diff --git a/sketchnotes/lesson-4.png b/sketchnotes/lesson-4.png
new file mode 100644
index 00000000..4f1bbb72
Binary files /dev/null and b/sketchnotes/lesson-4.png differ