Where's Waldo Hidden Message

123
Across
  1. 1. If I have three social studies classes and three SEL classes, how many classes do I have?
  2. 3. When you need to crack a code, you need to do this to it.
Down
  1. 1. A friend asks you to keep one of these sometimes.
  2. 2. This is the number of decades that have been in the 2000s.