During a number talk, students are thinking, asking their peers questions, and explaining their own thinking all while the teacher records the thinking. Sherry Parish has written the book Number Talks (Amazon affiliate link) and it offers awesome ideas for Kindergarten to 6th grade. It is definitely an expensive (up to $60 if bought new) but offers great ideas and real-life examples of Number Talks.
noun. Avalanche warning signs. Avalanche warning signs. The definition of avalanche means a massive quantity of something that comes suddenly such as snow, ice, earth or rocks that come loose and speed down a mountain. 1  An example of avalanche is a glacier that splits from a cliff face and hurdles down the side of a mountain.
A rock slides is the rapid sliding of a mass of bedrock along an inclined surface of weakness, such as a bedding plane, a major fracture int eh rock or a foliation plane. A rock avalanche is a very rapidly moving turbulent mass of broken up bedrock. Flowage on a grand scale.