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.
An avalanche is a sudden flow of snow down a slope, such as a mountainside. The amount of snow in an avalanche will vary based upon many factors, but it can be such a huge amount as to bury the terrain at the bottom of the slope in dozens of feet of snow. Avalanches can be caused by many different things. Some of them are natural. For example, new snow or rain can cause accumulated snow suddenly to dislodge and cascade down the side of a mountain. Earthquakes and the natural movements of animals have also been known to cause avalanches. Artificial triggers can also cause avalanches. For example, snowmobiles, skiers, gunshots and explosives have all been known to cause avalanches. Avalanches usually occur during the winter and spring, when snowfall is greatest.