If you do enough low pass filtering, you eventually end up with no variation at all; so why not simply keep a running average of ALL of the data values you have to date, and simply report the single number value of that average; it is probably at least as meaningful as your five year running average is. (wmbriggs.com)
prominently displayed cards or a chart containing an assigned number value for each letter of the alphabet; scrap paper and pencils (educationworld.com)
Resource Title Halloween Maths Activity Pack Age / Year Group Upper KS1 and KS2 Total Pages in download ❤ 31 File Type PDF Resource Content ❂ Number Value ❂ Ghost Fun ❂ Odd and Even ❂ Addition, Subtraction and Multiplication (these are all differentiated) ❂ Train Timetables ❂ Numbers in words ❂ Money ❂ Weight and Measurement ❂ Word Problems ❂ Halloween Task Cards Check the preview! (tes.com)