Hello Wei, Excellent post. I like how you have explained the signaling principle. You have stated that the inclusion of bold font and underlining of texts highlights the key points therein. These sentiments are true according to signaling principle which asserts that people learn better when cues that highlight the organization of the essential materials are added (Mayer, 2009). I also like how you have explained segmenting principle. You have indicated that the whole story is told in bits with few connecting words in lieu of a large text which would otherwise be boring to the readers. This assertion is true according to signaling principle which states that people learn better from short and user paced sections rather than continuous units. This manages essential processing. Lastly, I wonder if you would have considered contiguity principle in your post as your interactive story as you have placed corresponding pictures and words near each other.