Some unit changes implemented in 2017 to encourage spatial and design thinking in this unit: https://drive.google.com/file/d/0B0LlWBc4_vDkYUhOdUZLV3liWTQ/view?usp=sharing
Activity on passive solar: https://drive.google.com/file/d/0B0LlWBc4_vDkWlhPZTNCMkdKTlk/view?usp=sharing